列举英语的主要从句并附上例句,谢谢 10
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语 法 结 构-- 从 句
内 容 提 要
定语从句是由关系代词和关系副词引导的从句，其作用是作定语修饰主句的某个成分，定语从句分为限定性和非限定性从句两种。状语从句分为时间状语从句，结果状语从句，让步状语从句，原因状语从句，条件状语从句以及行为方式状语从句。名词从句包括主语从句，宾语从句，表语从句和同位语从句及there be句型。
I 定 语 从 句
一、 限定性定语从句
1. that即可代表事物也可代表人，which代表事物；它们在从句中作主语或宾语，that在从句中作宾语时常可省略关系词，which在从句中作宾语则不能省略。而且，如果which在从句中作“不及物动词＋介词”的介词的宾语，注意介词不要丢掉，而且介词总是放在关系代词which的前边，但有的则放在它原来的位置
1) The first doll say “mama”was invented in 1830．
〔A〕 that it could
〔B〕 could it
〔C〕 it could
〔D〕 that could
2) A solar day is the length of time the Earth to revolve once around the Sun．
〔A〕 takes
〔B〕 takes it
〔C〕 which takes
〔D〕 he takes
3) The period during when 〔A〕 people learned 〔B〕 to melt iron is called 〔C〕 the 〔D〕 Iron Age．
2. which作宾语时，根据先行词与定语从句之间的语义关系，先行词与which之间的介词不能丢
4) The second half of his voyage was by far the more dangerous part, he sailed round the treacherous Cape Horn.
〔A〕 where
〔B〕 of which
〔C〕 during which
〔D〕 that
5) To travel from England to Hope Corn had taken him nine months, the sailing time was 226 days. He had done what he wanted to accomplish.
〔A〕 when
〔B〕 which
〔C〕 of which
〔D〕 that
3. 代表物时多用which，但在带有下列词的句子中用that而不用which，这些词包括all, anything, much等，这时的that常被省略(见本节“四、关系代词的省略”)
4. who和whom引导的从句用来修饰人，分别作从句中的主语和宾语，whom作宾语时，要注意它可以作动词的宾语也可以作介词的宾语
6) Henry Ford is the person 〔A〕 which 〔B〕 is most responsible 〔C〕 for developing 〔D〕 the idea of mass production.
7) Human beings are social 〔A〕 animals whom 〔B〕 usually prefer not to live in 〔C〕 physical or psychological isolation 〔D〕 ．
5. where是关系副词，用来表示地点的定语从句
8) The Everglades is a beautiful region of southern Florida the primitive past mingles with modern life．
〔A〕 there
〔B〕 where
〔C〕 after
〔D〕 in
9) The knee is the joint the thigh bone meets the large bone of the lower leg．
〔A〕 when
〔B〕 where
〔C〕 why
〔D〕 which
10) A metropolitan region 〔A〕 is defined as a central 〔B〕 city and the territory where 〔C〕 surrounds 〔D〕 it．
6. when引导定语从句表示时间
11) The next morning he came down to breakfast, he was beaming with the pleasure of a new, great discovery.
〔A〕 as
〔B〕 when
〔C〕 because
〔D〕 that
12) In a day few noble persons ever spoke to those of humble origins except to give an order, Jefferson went out of his way to talk with gardeners, servants, and waiters.
〔A〕 whose
〔B〕 during
〔C〕 when
〔D〕 of
13) Moreover, in the modern age human beings depend so much on machines, he had given men throughout the world new pride.
〔A〕 when
〔B〕 whether
〔C〕 more
〔D〕 ever
〔注〕 值得一提的是，表示时间“time”一词的定语从句只用when引导，有时不用任何关系代词，当然也不用that引导
By the time you arrive in London, we will have stayed there for two weeks. ／ I still remember the first time I met her. ／ Each time he goes to besiness trip, he brings a lot of living necessities, such as towers, soap, toothbrush etc.
7. whose是关系代词，修饰名词作定语，相当于所修饰成分的前置所有格
14) There was a teapot fashioned like a China duck out of open mouth the tea was supposed to come.
〔A〕 which
〔B〕 its
〔C〕 that
〔D〕 whose
15) Jackir Mcleans’s recordings have shown that he is one of the few 〔A〕 jazz musicians who 〔B〕 style of playing 〔C〕 has kept pace with the evolution 〔D〕 of modern jazz．
8. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时，常用there is来引导
16) I don't want to concentrate on anything worrying me.
〔A〕 what is
〔B〕 there is
〔C〕 what
〔D〕 there
二、非限定性定语从句：非限定性定语从句的作用是对所修饰的成分作进一步说明，通常和主句间用逗号隔开，将从句拿掉后其他部分仍可成立
1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
2. 在引导限定性定语从句时，that有时相当于in which, at which, for which或at which
Attitudes towards daydreaming are changing in much the same way that(in which) attitudes towards night dreaming have changed. 人们对白日做梦的态度正在改变，这与人们对夜间做梦的看法的变化有非常相似之处。
I like the music for the very reason that(for which) he dislike it. 我出于某种原因喜欢这种音乐，而他恰恰与我相反。
We arrived the day that(on which) they left. 刚好我们到的那天他们走了。
3. 有时as也可用作关系代词
4. 在非限定性定语从句中，不能用that，而用who, whom代表人，用which代表事物
17) Ligaments(韧带)， ， hold organs of the body in place and fasten bones together．
〔A〕 which are fibrous tissues
〔B〕 they are fibrous tissues
〔C〕 fibrous tissues that
〔D〕 are fibrous tissues
18) The Little White House in Warm Springs was the Georgia home of President Franklin D. Roosevelt， there on April 12， 1945．
〔A〕 who died
〔B〕 died
〔C〕 while died
〔D〕 he died
19) The first United States citizen to become 〔A〕 a professional 〔B〕 sculptor was Patience Lovell Wright， which 〔C〕 works were executed in wax 〔D〕 ．
三、定语从句结构错误
1. 缺关系词
20) The adder is a snake has 〔A〕 a relatively 〔B〕 stout body， a short tail 〔C〕 ， and a flat head 〔D〕 ．
2. 从句中缺成分
21) Traditionally， ethnographers and linguists have paid 〔A〕 little attention to cultural interpretations given to 〔B〕 silence， or to 〔C〕 the types of social contexts in which tends 〔D〕 to occur．
四、连接代词的省略
22) Most crocodiles will eat anything capture and overpower．
〔A〕 can
〔B〕 they can
〔C〕 which can
〔D〕 and
五、例题解析
1) D为正确答案。本句中的主句为“The first doll was invented in 1830”，“that could say ‘mama’”为定语从句，修饰主句中的名词(主语)“the first doll”。
2) C为正确答案。
3) A错。during是介词，它后面的关系代词只能用which(指人除外)，which在此处指代“the period”，定语从句为“during which people…iron”，修饰主句的主语“the period”。
4) C为正确答案。
5) C为正确答案。
6) B错。改用who，which只能指物，指人时应用who，本句的定语从句修饰the person，关系代词who在从句中作主语。本句也可改用that，因为that也可用来指人，它可在从句中作主语或宾语，但which则只能指“物”。
7) B错。应改用who，因为这里所指代的是“human beings”，而且在从句中作主语，而whom只能用来作宾语。
8) B为正确答案。空白后是一个定语从句，从句中主谓宾齐全，关系副词where指代上面表示地点的名词region(地方，地区)，相当于in which，即in the region，在从句中作地点状语。
9) B对。空白后为定语从句，从句中的主谓宾语都已齐全，where作从句中的地点状语，相当于in the joint，整个从句修饰“the joint”。
10) C错。改为which或that。这里是一个定语从句，修饰前面的the territory(区域)，虽然被修饰成分表示一个地点，但若用where代替in the territory在从句中作地点状语，从句中便没有了主语，这显然不对。改用which后，便可由它作从句中的主语，代the territory；从句中的it代上文中的a central city。
11) B为正确答案。
12) C为正确答案。
13) A为正确答案。
14) D为正确答案。这里whose修饰名词短语“open mouth，” 这时“whose open mouth”一起作介词“of”的宾语。
15) B错。who应当在定语从句中作主语，而从句中已有主语style of playing(演奏风格)，故应将who改为whose，用whose修饰style，指代上文中的人名，相当于his。
16) B为正确答案。
17) A对。空白处是which引导的定语从句修饰主句的主语ligaments，which作从句的主语，主句的主语(ligaments)和谓语(hold)被定语从句所隔开。
18) A对。本句是关系代词who引导的非限定性定语从句，who指代前面的被修饰成分President Franklin D. Roosevelt并在从句中作主语。
19) C错。应改用whose，修饰从句中的主语works，whose相当于his。
20) A错。本句已有谓语动词is，而后面又出现动词has，显然不合语法，故应在snake和has之间加上关系代词which或that构成定语从句修饰snake，which作从句的主语。
21) D错。本句“in which”中的which指代“social contexts”，which在从句中已经是介词in的宾语，这样从句中便没有了主语，故应在which后加代词it(代silence)，即变为“in which it tends…”，用it作从句的主语，这样句子才完整。
22) B对。关系代词作限定性定语从句中的宾语时可以省略，本句被修饰词anything后就省去了“that”；C是不对的，首先，C中的which作从句的主语，而从句中的动词(作谓语)capture and overpower都为及物动词，可后面没有宾语，这样句子便不完整；其次，如果被修饰成分为不定代词(anything, all等)，或修饰成分前有形容词最高级以及限定性较强的形容词修饰时(the very，the only，the same，the first，the last，the tallest)，应使用关系代词that，而不用which。
从句是相对于主句而言的，即它是从属于某一个主句，而不能单独作一个句子。在英语中，主要有三大从句，即名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
主语从句用作主语，如：：
That the earth is round is true. 地球为圆的是真实的。
宾语从句用作宾语。如：
Do you know where he lives?
表语从句用作表语，如：
My opinion is that you should not go alone. 我的意见是你不应单独前往。
同位语从句用于解释说明前面的名词。如：
The fact that the earth is round is true. 地球是圆的的事实是真实的。（that从句用于解释说明the fact）
定语从句相当于一个形容词，用于修饰前面的名词。如：
The student who answered the question was John. 回答问题的学生是John.
状语从句相当于一个副词，如：
When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。（时间状语）
If he comes tomorrow, you will see him. 如果他明天来，你就可以看见他。（if 引导的条件状语从句，其结构为：if +状语从句，＋主句）。要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
主句和从句的划分方法是相同的。句子的成分从谓语动词处来划分比较容易。谓语动词前面的部分是主语，后面常接宾语，修饰谓语动词的是状语，修饰主语、宾语的是定语，若谓语是系动词，则系动词后的部分是表语。如：
I am a teacher. 其中，I 是主语，am是谓语，a teacher 是表语。
He likes playing football very mucy. 其中，he是主语，likes是谓语，playing football是宾语，very much是状语。
从句是相对于主句而言的，即它是从属于某一个主句，而不能单独作一个句子。在英语中，主要有三大从句，即名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
主语从句用作主语，如：：
That the earth is round is true. 地球为圆的是真实的。
宾语从句用作宾语。如：
Do you know where he lives?
表语从句用作表语，如：
My opinion is that you should not go alone. 我的意见是你不应单独前往。
同位语从句用于解释说明前面的名词。如：
The fact that the earth is round is true. 地球是圆的的事实是真实的。（that从句用于解释说明the fact）
定语从句相当于一个形容词，用于修饰前面的名词。如：
The student who answered the question was John. 回答问题的学生是John.
状语从句相当于一个副词，如：
When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。（时间状语）
If he comes tomorrow, you will see him. 如果他明天来，你就可以看见他。（if 引导的条件状语从句，其结构为：if +状语从句，＋主句）。要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
主句和从句的划分方法是相同的。句子的成分从谓语动词处来划分比较容易。谓语动词前面的部分是主语，后面常接宾语，修饰谓语动词的是状语，修饰主语、宾语的是定语，若谓语是系动词，则系动词后的部分是表语。如：
I am a teacher. 其中，I 是主语，am是谓语，a teacher 是表语。
He likes playing football very mucy. 其中，he是主语，likes是谓语，playing football是宾语，very much是状语。
内 容 提 要
定语从句是由关系代词和关系副词引导的从句，其作用是作定语修饰主句的某个成分，定语从句分为限定性和非限定性从句两种。状语从句分为时间状语从句，结果状语从句，让步状语从句，原因状语从句，条件状语从句以及行为方式状语从句。名词从句包括主语从句，宾语从句，表语从句和同位语从句及there be句型。
I 定 语 从 句
一、 限定性定语从句
1. that即可代表事物也可代表人，which代表事物；它们在从句中作主语或宾语，that在从句中作宾语时常可省略关系词，which在从句中作宾语则不能省略。而且，如果which在从句中作“不及物动词＋介词”的介词的宾语，注意介词不要丢掉，而且介词总是放在关系代词which的前边，但有的则放在它原来的位置
1) The first doll say “mama”was invented in 1830．
〔A〕 that it could
〔B〕 could it
〔C〕 it could
〔D〕 that could
2) A solar day is the length of time the Earth to revolve once around the Sun．
〔A〕 takes
〔B〕 takes it
〔C〕 which takes
〔D〕 he takes
3) The period during when 〔A〕 people learned 〔B〕 to melt iron is called 〔C〕 the 〔D〕 Iron Age．
2. which作宾语时，根据先行词与定语从句之间的语义关系，先行词与which之间的介词不能丢
4) The second half of his voyage was by far the more dangerous part, he sailed round the treacherous Cape Horn.
〔A〕 where
〔B〕 of which
〔C〕 during which
〔D〕 that
5) To travel from England to Hope Corn had taken him nine months, the sailing time was 226 days. He had done what he wanted to accomplish.
〔A〕 when
〔B〕 which
〔C〕 of which
〔D〕 that
3. 代表物时多用which，但在带有下列词的句子中用that而不用which，这些词包括all, anything, much等，这时的that常被省略(见本节“四、关系代词的省略”)
4. who和whom引导的从句用来修饰人，分别作从句中的主语和宾语，whom作宾语时，要注意它可以作动词的宾语也可以作介词的宾语
6) Henry Ford is the person 〔A〕 which 〔B〕 is most responsible 〔C〕 for developing 〔D〕 the idea of mass production.
7) Human beings are social 〔A〕 animals whom 〔B〕 usually prefer not to live in 〔C〕 physical or psychological isolation 〔D〕 ．
5. where是关系副词，用来表示地点的定语从句
8) The Everglades is a beautiful region of southern Florida the primitive past mingles with modern life．
〔A〕 there
〔B〕 where
〔C〕 after
〔D〕 in
9) The knee is the joint the thigh bone meets the large bone of the lower leg．
〔A〕 when
〔B〕 where
〔C〕 why
〔D〕 which
10) A metropolitan region 〔A〕 is defined as a central 〔B〕 city and the territory where 〔C〕 surrounds 〔D〕 it．
6. when引导定语从句表示时间
11) The next morning he came down to breakfast, he was beaming with the pleasure of a new, great discovery.
〔A〕 as
〔B〕 when
〔C〕 because
〔D〕 that
12) In a day few noble persons ever spoke to those of humble origins except to give an order, Jefferson went out of his way to talk with gardeners, servants, and waiters.
〔A〕 whose
〔B〕 during
〔C〕 when
〔D〕 of
13) Moreover, in the modern age human beings depend so much on machines, he had given men throughout the world new pride.
〔A〕 when
〔B〕 whether
〔C〕 more
〔D〕 ever
〔注〕 值得一提的是，表示时间“time”一词的定语从句只用when引导，有时不用任何关系代词，当然也不用that引导
By the time you arrive in London, we will have stayed there for two weeks. ／ I still remember the first time I met her. ／ Each time he goes to besiness trip, he brings a lot of living necessities, such as towers, soap, toothbrush etc.
7. whose是关系代词，修饰名词作定语，相当于所修饰成分的前置所有格
14) There was a teapot fashioned like a China duck out of open mouth the tea was supposed to come.
〔A〕 which
〔B〕 its
〔C〕 that
〔D〕 whose
15) Jackir Mcleans’s recordings have shown that he is one of the few 〔A〕 jazz musicians who 〔B〕 style of playing 〔C〕 has kept pace with the evolution 〔D〕 of modern jazz．
8. 当从句的逻辑主语是some, any, no, somebody, anybody, nobody, something, anything, everything或nothing时，常用there is来引导
16) I don't want to concentrate on anything worrying me.
〔A〕 what is
〔B〕 there is
〔C〕 what
〔D〕 there
二、非限定性定语从句：非限定性定语从句的作用是对所修饰的成分作进一步说明，通常和主句间用逗号隔开，将从句拿掉后其他部分仍可成立
1. which引导的非限定性定语从句来说明前面整个句子的情况或主句的某一部分
2. 在引导限定性定语从句时，that有时相当于in which, at which, for which或at which
Attitudes towards daydreaming are changing in much the same way that(in which) attitudes towards night dreaming have changed. 人们对白日做梦的态度正在改变，这与人们对夜间做梦的看法的变化有非常相似之处。
I like the music for the very reason that(for which) he dislike it. 我出于某种原因喜欢这种音乐，而他恰恰与我相反。
We arrived the day that(on which) they left. 刚好我们到的那天他们走了。
3. 有时as也可用作关系代词
4. 在非限定性定语从句中，不能用that，而用who, whom代表人，用which代表事物
17) Ligaments(韧带)， ， hold organs of the body in place and fasten bones together．
〔A〕 which are fibrous tissues
〔B〕 they are fibrous tissues
〔C〕 fibrous tissues that
〔D〕 are fibrous tissues
18) The Little White House in Warm Springs was the Georgia home of President Franklin D. Roosevelt， there on April 12， 1945．
〔A〕 who died
〔B〕 died
〔C〕 while died
〔D〕 he died
19) The first United States citizen to become 〔A〕 a professional 〔B〕 sculptor was Patience Lovell Wright， which 〔C〕 works were executed in wax 〔D〕 ．
三、定语从句结构错误
1. 缺关系词
20) The adder is a snake has 〔A〕 a relatively 〔B〕 stout body， a short tail 〔C〕 ， and a flat head 〔D〕 ．
2. 从句中缺成分
21) Traditionally， ethnographers and linguists have paid 〔A〕 little attention to cultural interpretations given to 〔B〕 silence， or to 〔C〕 the types of social contexts in which tends 〔D〕 to occur．
四、连接代词的省略
22) Most crocodiles will eat anything capture and overpower．
〔A〕 can
〔B〕 they can
〔C〕 which can
〔D〕 and
五、例题解析
1) D为正确答案。本句中的主句为“The first doll was invented in 1830”，“that could say ‘mama’”为定语从句，修饰主句中的名词(主语)“the first doll”。
2) C为正确答案。
3) A错。during是介词，它后面的关系代词只能用which(指人除外)，which在此处指代“the period”，定语从句为“during which people…iron”，修饰主句的主语“the period”。
4) C为正确答案。
5) C为正确答案。
6) B错。改用who，which只能指物，指人时应用who，本句的定语从句修饰the person，关系代词who在从句中作主语。本句也可改用that，因为that也可用来指人，它可在从句中作主语或宾语，但which则只能指“物”。
7) B错。应改用who，因为这里所指代的是“human beings”，而且在从句中作主语，而whom只能用来作宾语。
8) B为正确答案。空白后是一个定语从句，从句中主谓宾齐全，关系副词where指代上面表示地点的名词region(地方，地区)，相当于in which，即in the region，在从句中作地点状语。
9) B对。空白后为定语从句，从句中的主谓宾语都已齐全，where作从句中的地点状语，相当于in the joint，整个从句修饰“the joint”。
10) C错。改为which或that。这里是一个定语从句，修饰前面的the territory(区域)，虽然被修饰成分表示一个地点，但若用where代替in the territory在从句中作地点状语，从句中便没有了主语，这显然不对。改用which后，便可由它作从句中的主语，代the territory；从句中的it代上文中的a central city。
11) B为正确答案。
12) C为正确答案。
13) A为正确答案。
14) D为正确答案。这里whose修饰名词短语“open mouth，” 这时“whose open mouth”一起作介词“of”的宾语。
15) B错。who应当在定语从句中作主语，而从句中已有主语style of playing(演奏风格)，故应将who改为whose，用whose修饰style，指代上文中的人名，相当于his。
16) B为正确答案。
17) A对。空白处是which引导的定语从句修饰主句的主语ligaments，which作从句的主语，主句的主语(ligaments)和谓语(hold)被定语从句所隔开。
18) A对。本句是关系代词who引导的非限定性定语从句，who指代前面的被修饰成分President Franklin D. Roosevelt并在从句中作主语。
19) C错。应改用whose，修饰从句中的主语works，whose相当于his。
20) A错。本句已有谓语动词is，而后面又出现动词has，显然不合语法，故应在snake和has之间加上关系代词which或that构成定语从句修饰snake，which作从句的主语。
21) D错。本句“in which”中的which指代“social contexts”，which在从句中已经是介词in的宾语，这样从句中便没有了主语，故应在which后加代词it(代silence)，即变为“in which it tends…”，用it作从句的主语，这样句子才完整。
22) B对。关系代词作限定性定语从句中的宾语时可以省略，本句被修饰词anything后就省去了“that”；C是不对的，首先，C中的which作从句的主语，而从句中的动词(作谓语)capture and overpower都为及物动词，可后面没有宾语，这样句子便不完整；其次，如果被修饰成分为不定代词(anything, all等)，或修饰成分前有形容词最高级以及限定性较强的形容词修饰时(the very，the only，the same，the first，the last，the tallest)，应使用关系代词that，而不用which。
从句是相对于主句而言的，即它是从属于某一个主句，而不能单独作一个句子。在英语中，主要有三大从句，即名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
主语从句用作主语，如：：
That the earth is round is true. 地球为圆的是真实的。
宾语从句用作宾语。如：
Do you know where he lives?
表语从句用作表语，如：
My opinion is that you should not go alone. 我的意见是你不应单独前往。
同位语从句用于解释说明前面的名词。如：
The fact that the earth is round is true. 地球是圆的的事实是真实的。（that从句用于解释说明the fact）
定语从句相当于一个形容词，用于修饰前面的名词。如：
The student who answered the question was John. 回答问题的学生是John.
状语从句相当于一个副词，如：
When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。（时间状语）
If he comes tomorrow, you will see him. 如果他明天来，你就可以看见他。（if 引导的条件状语从句，其结构为：if +状语从句，＋主句）。要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
主句和从句的划分方法是相同的。句子的成分从谓语动词处来划分比较容易。谓语动词前面的部分是主语，后面常接宾语，修饰谓语动词的是状语，修饰主语、宾语的是定语，若谓语是系动词，则系动词后的部分是表语。如：
I am a teacher. 其中，I 是主语，am是谓语，a teacher 是表语。
He likes playing football very mucy. 其中，he是主语，likes是谓语，playing football是宾语，very much是状语。
从句是相对于主句而言的，即它是从属于某一个主句，而不能单独作一个句子。在英语中，主要有三大从句，即名词性从句（包括主语从句，宾语从句，表语从句，同位语从句）、形容词性从句（即定语从句）、副词性从句（即状语从句,包括时间、条件、结果、目的、原因、让步、地点、方式等）。
主语从句用作主语，如：：
That the earth is round is true. 地球为圆的是真实的。
宾语从句用作宾语。如：
Do you know where he lives?
表语从句用作表语，如：
My opinion is that you should not go alone. 我的意见是你不应单独前往。
同位语从句用于解释说明前面的名词。如：
The fact that the earth is round is true. 地球是圆的的事实是真实的。（that从句用于解释说明the fact）
定语从句相当于一个形容词，用于修饰前面的名词。如：
The student who answered the question was John. 回答问题的学生是John.
状语从句相当于一个副词，如：
When it rains, I usually go to school by bus. 天下雨时，我通常坐公共汽车上学。（时间状语）
If he comes tomorrow, you will see him. 如果他明天来，你就可以看见他。（if 引导的条件状语从句，其结构为：if +状语从句，＋主句）。要注意在状语从句中有一个规则是“主将从现”，即主句是将来时，则从句要用一般现在时表示将来。
主句和从句的划分方法是相同的。句子的成分从谓语动词处来划分比较容易。谓语动词前面的部分是主语，后面常接宾语，修饰谓语动词的是状语，修饰主语、宾语的是定语，若谓语是系动词，则系动词后的部分是表语。如：
I am a teacher. 其中，I 是主语，am是谓语，a teacher 是表语。
He likes playing football very mucy. 其中，he是主语，likes是谓语，playing football是宾语，very much是状语。
参考资料： zhidao
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在句子中起名词作用的句子叫名词从句 (Noun Clauses）。 名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据它在句中不同的语法功能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句。
17.1 引导名词性从句的连接词
引导名词性从句的连接词可分为三类：
连接词：that,whether,if 不充当从句的任何成分）
连接代词：what, whatever, who, whoever, whom,
whose, which.
连接副词：when, where, how, why
不可省略的连词：
1. 介词后的连词
2. 引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy.
We heard the news that our team had won.
比较：whether与if 均为"是否"的意思。 但在下列情况下，whether 不能被if 取代：
1. whether引导主语从句并在句首
2. 引导表语从句
3. whether从句作介词宾语
4. 从句后有"or not"
Whether he will come is not clear.
大部分连接词引导的主语从句都可以置于句末，用 it充当形式主语。
It is not important who will go.
It is still unknown which team will win the match.
17.2 名词性that-从句
1）由从属连词that引导的从句叫做名词性that-从句。 That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主 语、宾语、表语、同位语和形容词宾语，例如：
主语：That he is still alive is sheer luck. 他还活着全靠运气。
宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去。
表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。
同位语：The fact that he has not been seen recently disturbs everyone in his office.
近来谁也没有见过他，这一事实令办公室所有的人不安。
形容词宾语：I am glad that you are satisfied with your job.
你对工作满意我感到很高兴。
2）That- 从句作主语通常用it作先行词，而将that-从句置于句末，例如：
It is quite clear that the whole project is doomed to failure. 很清楚，整个计划注定要失败。
It's a pity that you should have to leave. 你非走不可真是件憾事。
用it作形式主语的that-从句有以下四种不同的搭配关系：
a. It + be +形容词+ that-从句
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明显……
b. It + be + -ed 分词+ that-从句
It is believed that… 人们相信……
It is known to all that… 从所周知……
It has been decided that… 已决定……
c. It + be +名词+ that-从句
It is common knowledge that… ……是常识
It is a surprise that… 令人惊奇的是……
It is a fact that… 事实是……
d. It +不及物动词+ that-分句
It appears that… 似乎……
It happens that… 碰巧……
It occurred to me that… 我突然想起……
17.3 名词性wh-从句
1）由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如：
主语： How the book will sell depends on its author. 书销售如何取决于作者本人。
直接宾语：In one's own home one can do what one likes. 在自己家里可以随心所欲。
间接宾语：The club will give whoever wins a prize.
俱乐部将给得胜者设奖。
表语： My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。
宾语补足语：She will name him whatever she wants to. 她高兴给他起什么名字就取什么名字。
同位语： I have no idea when he will return.
我不知道他什么时候回来。
形容词宾语：I'm not sure why she refused their invitation. 我尚不能肯定她为什么拒绝他们的邀请。
介词宾语： That depends on where we shall go.
那取决于我们去哪儿。
2）Wh-从句作主语也常用先行词it做形式主语，而将wh-从句置于句末，例如：
It is not yet decided who will do that job.
还没决定谁做这项工作。
It remains unknown when they are going to get married. 他们何时结婚依然不明。
17.4 if, whether引导的名词从句
1）yes-no型疑问从句
从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no 型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同， 例如：
主语：Whether the plan is feasible remains to be proved. 这一计划是否可行还有等证实。
宾语：Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。
表语：The point is whether we should lend him the money. 问题在于我们是否应该借钱给他。
同位语：They are investigating the question whether the man is trustworthy. 他们调查他是否值得信赖。
形容词宾语： She's doubtful whether we shall be able to come. 她怀疑我们是否能够前来。
介词宾语： I worry about whether he can pass through the crisis of his illness. 我担心他是否能度过疾病的危险期。
2）选择性疑问从句
选择性疑问从句由关联词if/whether…or或whethe…or not构成，例如：
Please tell me whether / if they are Swedish or Danish. 请告诉我他们是瑞典人还是丹麦人。
I don't care whether you like the plan or not.我不在乎你是否喜欢该计划。
17.5 否定转移
1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。
I don't think I know you. 我想我并不认识你。
I don' t believe he will come. 我相信他不回来。
注意：若谓语动词为hope,宾语从句中的否定词不能转移。
I hope you weren't ill. 我想你没有生病吧。
2) 将seem, appear 等后的从句的否定转移到前面。
It doesn't seem that they know where to go.
看来他们不知道往哪去。
It doesn't appear that we'll have a sunny day tomorrow.
看来我们明天不会碰上好天气。
3) 有时将动名词，介词短语或整个从句的否定转变为对谓语动词的否定。
I don't remember having ever seen such a man.
我记得从未见过这样一个人。 (not否定动名词短语 having…)
It's not a place where anyone would expect to see strange characters on the street.
在这里，人们不会想到在街上会碰上陌生的人。
(anyone 作主语，从句中的谓语动词不能用否定形式。)
4) 有时状语或状语从句中否定可以转移到谓语动词前。
The ant is not gathering this for itself alone. (否定状语) 蚂蚁不只是为自己采食。
He was not ready to believe something just because Aristotle said so. (否定because状语) 他并不因亚里斯多德说过如何如何，就轻信此事。
She had not been married many weeks when that man's younger brother saw her and was struck by her beauty. (否定状语many weeks) 她结婚还不到几个月，这个人的弟弟就看见她了，并对她的美貌着了迷。
17.1 引导名词性从句的连接词
引导名词性从句的连接词可分为三类：
连接词：that,whether,if 不充当从句的任何成分）
连接代词：what, whatever, who, whoever, whom,
whose, which.
连接副词：when, where, how, why
不可省略的连词：
1. 介词后的连词
2. 引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy.
We heard the news that our team had won.
比较：whether与if 均为"是否"的意思。 但在下列情况下，whether 不能被if 取代：
1. whether引导主语从句并在句首
2. 引导表语从句
3. whether从句作介词宾语
4. 从句后有"or not"
Whether he will come is not clear.
大部分连接词引导的主语从句都可以置于句末，用 it充当形式主语。
It is not important who will go.
It is still unknown which team will win the match.
17.2 名词性that-从句
1）由从属连词that引导的从句叫做名词性that-从句。 That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主 语、宾语、表语、同位语和形容词宾语，例如：
主语：That he is still alive is sheer luck. 他还活着全靠运气。
宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去。
表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。
同位语：The fact that he has not been seen recently disturbs everyone in his office.
近来谁也没有见过他，这一事实令办公室所有的人不安。
形容词宾语：I am glad that you are satisfied with your job.
你对工作满意我感到很高兴。
2）That- 从句作主语通常用it作先行词，而将that-从句置于句末，例如：
It is quite clear that the whole project is doomed to failure. 很清楚，整个计划注定要失败。
It's a pity that you should have to leave. 你非走不可真是件憾事。
用it作形式主语的that-从句有以下四种不同的搭配关系：
a. It + be +形容词+ that-从句
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明显……
b. It + be + -ed 分词+ that-从句
It is believed that… 人们相信……
It is known to all that… 从所周知……
It has been decided that… 已决定……
c. It + be +名词+ that-从句
It is common knowledge that… ……是常识
It is a surprise that… 令人惊奇的是……
It is a fact that… 事实是……
d. It +不及物动词+ that-分句
It appears that… 似乎……
It happens that… 碰巧……
It occurred to me that… 我突然想起……
17.3 名词性wh-从句
1）由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如：
主语： How the book will sell depends on its author. 书销售如何取决于作者本人。
直接宾语：In one's own home one can do what one likes. 在自己家里可以随心所欲。
间接宾语：The club will give whoever wins a prize.
俱乐部将给得胜者设奖。
表语： My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。
宾语补足语：She will name him whatever she wants to. 她高兴给他起什么名字就取什么名字。
同位语： I have no idea when he will return.
我不知道他什么时候回来。
形容词宾语：I'm not sure why she refused their invitation. 我尚不能肯定她为什么拒绝他们的邀请。
介词宾语： That depends on where we shall go.
那取决于我们去哪儿。
2）Wh-从句作主语也常用先行词it做形式主语，而将wh-从句置于句末，例如：
It is not yet decided who will do that job.
还没决定谁做这项工作。
It remains unknown when they are going to get married. 他们何时结婚依然不明。
17.4 if, whether引导的名词从句
1）yes-no型疑问从句
从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no 型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同， 例如：
主语：Whether the plan is feasible remains to be proved. 这一计划是否可行还有等证实。
宾语：Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。
表语：The point is whether we should lend him the money. 问题在于我们是否应该借钱给他。
同位语：They are investigating the question whether the man is trustworthy. 他们调查他是否值得信赖。
形容词宾语： She's doubtful whether we shall be able to come. 她怀疑我们是否能够前来。
介词宾语： I worry about whether he can pass through the crisis of his illness. 我担心他是否能度过疾病的危险期。
2）选择性疑问从句
选择性疑问从句由关联词if/whether…or或whethe…or not构成，例如：
Please tell me whether / if they are Swedish or Danish. 请告诉我他们是瑞典人还是丹麦人。
I don't care whether you like the plan or not.我不在乎你是否喜欢该计划。
17.5 否定转移
1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。
I don't think I know you. 我想我并不认识你。
I don' t believe he will come. 我相信他不回来。
注意：若谓语动词为hope,宾语从句中的否定词不能转移。
I hope you weren't ill. 我想你没有生病吧。
2) 将seem, appear 等后的从句的否定转移到前面。
It doesn't seem that they know where to go.
看来他们不知道往哪去。
It doesn't appear that we'll have a sunny day tomorrow.
看来我们明天不会碰上好天气。
3) 有时将动名词，介词短语或整个从句的否定转变为对谓语动词的否定。
I don't remember having ever seen such a man.
我记得从未见过这样一个人。 (not否定动名词短语 having…)
It's not a place where anyone would expect to see strange characters on the street.
在这里，人们不会想到在街上会碰上陌生的人。
(anyone 作主语，从句中的谓语动词不能用否定形式。)
4) 有时状语或状语从句中否定可以转移到谓语动词前。
The ant is not gathering this for itself alone. (否定状语) 蚂蚁不只是为自己采食。
He was not ready to believe something just because Aristotle said so. (否定because状语) 他并不因亚里斯多德说过如何如何，就轻信此事。
She had not been married many weeks when that man's younger brother saw her and was struck by her beauty. (否定状语many weeks) 她结婚还不到几个月，这个人的弟弟就看见她了，并对她的美貌着了迷。
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