求八年级上册英语grammar focus的句子

没有八上的书,但是要八上grammarfocus的句子写作业,所以求八上一、二、三、四、五、九、十单元里grammarfocus的句子,谢谢,急求!... 没有八上的书,但是要八上grammar focus的句子写作业,所以求八上一、二、三、四、五、九、十单元里grammar focus的句子,谢谢,急求! 展开
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英语语法中的16种时态
所谓“时”就是行为发生的时段或状态存在的时段,即:现在、过去、将来和过去将来四种;所谓“态”就是行为或状态发生时说呈现的状态,有一般状态、进行状态、完成状态或完成进行状态四种。由时和态结合,便形成下列十六种时态:
一般状态:一般现在时,一般过去时,一般将来时,一般过去将来时;
进行状态:现在进行时,过去进行时,将来进行时,过去将来进行时;
完成状态:现在完成时,过去完成时,将来完成时,过去将来完成时;
完成进行状态:现在完成进行时,过去完成进行时,将来完成进行时,过去将来完成进行时.
一、 一般现在时
1.概念:经常、反复发生的动作或行为及现在的某种状况。
2.时间状语: always, usually, often, sometimes, every week (day, year, month…), once a week, on Sundays,
3.基本结构:动词 原形 (如主语为第三人称单数,动词上要改为第三人称单数形式)
4.否定形式:am/is/are+not;此时态的谓语动词若为行为动词,则在其前加don't,如主语为第三人称单数,则用doesn't,同时还原行为动词。
5.一般疑问句:把be动词放于句首;用助动词do提问,如主语为第三人称单数,则用does,同时,还原行为动词。6.例句:. It seldom ['seldəm]很少snows here.
He is always ready to help others. Action speaks louder than words..
二、 一般过去时
1.概念:过去某个时间里发生的动作或状态;过去习惯性、经常性的动作、行为。
2.时间状语:ago, yesterday, the day before yesterday, last week,last(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.
3.基本结构:be动词;行为动词 的过去式
4.否定形式:was/were+not;在行为动词前加didn't,同时还原行为动词。
5.一般疑问句:was或were放于句首;用助动词do的过去式did 提问,同时还原行为动词。6.例句:She often came to help us in those days. I didn't know you were so busy.
三、 现在进行时
1.概念:表示现阶段或说话时正在进行的动作及行为。
2.时间状语:now, at this time, days, etc. look . listen
3.基本结构:be+doing 4.否定形式:be+not+doing.
5.一般疑问句:把be动词放于句首。
6.例句: How are you feeling today? He is doing well in his lessons.
四、 过去进行时
1.概念:表示过去某段时间或某一时刻正在发生或进行的行为或动作。
2.时间状语:at this time yesterday, at that time或以when引导的谓语动词是一般过去时的时间状语等。3.基本结构 s+was/were+doing 4.否定形式:s+was/were + not + doing.
5.一般疑问句:把was或were放于句首。(第一个字母大写)
6.例句:At that time she was working in a PLA unit.
When he came in, I was reading a newspaper.
五、 现在完成时
1.概念:过去发生或已经完成的动作对现在造成的影响或结果,或从过去已经开始,持续到现在的动作或状态。2.时间状语:yet,already,just,never,ever,so far,by now,since+时间点,for+时间段,recently, lately, in the past few years, etc.
3.基本结构:have/has + done 4.否定形式:have/has + not +done.
5.一般疑问句:have或has。
6.例句:I've written an article. The countryside has changed a lot in the past few years.
六、 过去完成时
1.概念:以过去某个时间为标准,在此以前发生的动作或行为,或在过去某动作之前完成的行为,即“过去的过去”。2.时间状语:before, by the end of last year(term, month…),etc.
3.基本结构:had + done. 4.否定形式:had + not + done.
5.一般疑问句:had放于句首。6.例句:As soon as we got to the station, the train had left.
By the end of last month. We had reviewed four books
基本结构:主语+had+过去分词(done)
①肯定句:主语+had+过去分词+其他
②否定句:主语+had+not+过去分词+其他
③一般疑问句:Had+主语+过去分词+其他
④特殊疑问句:特殊疑问词+一般疑问句
七、 一般将来时
1.概念:表示将要发生的动作或存在的状态及打算、计划或准备做某事。
2.时间状语:tomorrow, next day(week, month, year…),soon, in a few minutes, by…,the day after tomorrow, etc.
3.基本结构:主语+am/is/are+going to + do;will/shall + do.
4.否定形式:am/is/are not going to do ;will/shall not do。
5.一般疑问句:be放于句首;will/shall提到句首。6.例句:They are going to have a competition with us in studies. It is going to rain.
八、 过去将来时
1.概念:立足于过去某一时刻,从过去看将来,常用于宾语从句中。
2.时间状语:the next day(morning, year…),the following month(week…),etc.
3.基本结构:was/were+going to + do;would/should + do.
4.否定形式:was/were/not + going to + do;would/should + not + do.
5.一般疑问句:was或were放于句首;would/should 提到句首。
6.例句:He said he would go to Beijing the next day. I asked who was going there .
九、将来完成时
1.概念:在将来某一时刻之前开始的动作或状态
2.时间状语:by the time of;by the end of+时间短语(将来);by the time+从句(将来)
3.基本结构:be going to/will/shall + have done
4例句:By the time you get back,great changes will have taken place in this area.
十、现在完成进行时
1.概念:表示从过去某一时间开始一直延续到现在的动作。这一动作可能刚刚开始,也可能仍在继续,并可能延续到将来。2.基本结构:have/has +been+doing
3.时间状语:since+时间点,for+时间段等。4.例子:I have been sitting here for an hour.
The chirdren have been watching TV since six o'clock.
十一、 一般过去时与现在完成时的转换
在现在完成时中,延续性动词能与表示一段时间的状语连用,瞬间动词却不能。但是,可用别的表达方式:①瞬间动词用于“一段时间 + ago”的一般过去时的句型中;②瞬间动词可改成与之相对应的延续性动词及短语,与一段时间连用;③瞬间动词用于“It is + 一段时间 + since + 一般过去时”的句型中,表示“自从……以来有……时间”的意思,主句一般用it is来代替It has been;④瞬间动词用于“Some time has passed since + 一般过去时”的句型中。请看:A. He joined the League two years ago.
B. He has been in the League for two years. C. It is two years since he joined the League.
D. Two years has passed since he joined the League.
十二、 一般现在时与现在进行时的转换
在一般现在时中,at加上名词表示“处于某种状态”,如at work(在工作), at school(上学、上课)等。此短语可与进行时态转换。请看:Peter is at work, but Mike is at play.
Peter is working, but Mike is playing.
十三、 现在进行时与一般将来时的转换
在现在进行时态中go, come, leave, start, arrive等动词常与表示将来的时间状语连用表示将要发生的动作。如:I am coming, Mum! 意为“我就来,妈妈!”请看:
The train is leaving soon. The train will leave soon.
时态 - 互相转换
英语中的几种时态在一定情况下可以互相转换,以下是几种常见的转换形式:

英语从句分类与解析
 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4种(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1种(即定语从句)、副词性从句1种(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)
形容词性从句1种: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.
副词性从句1种:状语从句相当于一个副词,(时间状语)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。
(条件状语从句) 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。
He returned home to learn his daughter had just been engaged.他回家后得知女儿刚刚订婚了。(结果状语,结果状语只是仅限于learn(得知),find(发现),see,hear,to be told(被告知),make(使得)等具有界限含义的动词。)
 (目的状语)You must speak louder so that /in order that you can be heard by all. 你必须大声说话,才能让所有人听到你说话。(目的状语,可以由that, so that, in order that, lest, for fear that, in case等词引导。)
 (原因状语)Since /As the weather is so bad, we have to delay our journey. 天气那么糟,旅行推迟了。 (原因状语从句,常用 because, since, as, for fear ( 恐怕 ), seeing that ( 既然 ) now that (=since),considering that ( 考虑到 ) 等引导。)(让步状语从句) Though/Though he was worn out, (still) he kept on working. 虽然他已经精疲力竭了,但仍然继续工作。 (让步状语从句,引导的连词主要有以下这些:though, although, as; even if, even though;whether…or…; no matter+疑问词,疑问词-ever.)(地点状语从句)Where I live there are plenty of trees. 我住的地方树很多。(地点状语从句,通常由where, wherever引导。)
(方式状语从句)As water is to fish, so air is to man. 我们离不开空气,犹如鱼儿离不开水。(方式状语从句通常由as, (just) as…so…, as if, as though引导。)
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 much. 其中,he是主语,likes是谓语,playing football是宾语,very much是状语。
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追问
谢谢,不过我要的是句子,,
追答
啊!我只看了英文grammar focus(语法重点)。若对您有用的话,敬请!采纳!
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