问一些高中英语问题4，希望详细解答，谢谢！
2. I found there wasn't much that I could do to help the host family in cooking.这里that的地方为什么不能用what？
3. They will never forget the days that they spent together studying abroad.为什么that处不能用when和during which？
4. In that case 什么意思？
5. Then I left, feeling such a weight at my heart as I had never had before.为什么as处不能用that？
6. Who that has brains will make such a mistake as this?这里that起到什么作用？
7. The couple has four children, and the oldest of them is in the Royal Air Force. 为什么and that oldest of them处用one of them 是错误的？
8. At such a late hour, there wasn't a single person to whom I could turn for help.为什么 to whom 处不能用who？
9. She arrived in Magnolia in 2012, where, come time later, she became a manager of a big company. 为什么用where不用when？
10. Except when 什么意思？In order that什么意思？ 展开
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while的用法区别。
①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如:
The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest.
2)表示两个同步发生的动作或行?意思是随着-----的发展.如:
As time went on / by, she became more and more beautiful .
As children get older, they become more and more interested in everything.
3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.
I thought of it just as you opened your mouth.
2.that此处引导定语从句
3.that此处引导定语从句，they spent the day together studying abroad
4.1. in that case
表示：要是那样的话
5.As =in the way that像、按照……的方式
6.引导主语从句
7.the oldest of them 强调其中的老大
8.turn to 短语用法
9.非限定性定语从句
10.except when 除了.......的时候 in order that为了
As用法
as可用作连词，引导比较、时间、原因及方式等四种状语从句，应注意的是，引导的比较状语从句往往有省略；引导的时间状语从句一般用一般现在时而不用一般将来时；引导原因状语从句时与“Because”和“since”引导的从句比较起起来语气最弱。
as作介词，意思时“作为”，“以……身份”。例如：He came to China as a tourist five years ago.
而表示像…一样时，like通常作介词用，而介词后面通常接名词，代名词和动名词。
as in Australia“和在澳大利亚一样”。
as……as
AS +adj(原级)+AS
AS +adv(原级)+AS
as soon as 一……就
as soon as possible 尽可能快地
as early as possible 尽可能早的
as carefully as you can 尽可能认真地
as careful as you can 尽可能认真的
1。as是连词，表示“随着”的意义。lives是life的复数，意义是“生活”。<BR>
2。as是连词，表示“因为，由于”的意义。wanting是现在分词，表示主动意义，wanting to buy cars=who want to buy cars。
As的用法小结
as可以作连词、介词及关系代词和副词。现将其用法小结如下:
（一）、 as作连词的用法:
1.作“在-------期间，当----的时候”引导时间状语从句.注意与when、 while的用法区别。
①下列情形时,只用as, 而不用when或while。
1)用于表示同一个人的两种动作交替进行,指一边----一边. 如:
The girl sings as she goes to school.
He looked behind occasionally as he went forward in the forest.
2)表示两个同步发生的动作或行?意思是随着-----的发展.如:
As time went on / by, she became more and more beautiful .
As children get older, they become more and more interested in everything.
3)表示两个短暂行为或事情几乎同时发生.如:I watched her as she read the book.
I thought of it just as you opened your mouth.
Just as the flying worm hit her face, she gave a loud cry.
4)接在名词后面表示某一个年龄段时.如:
As a young man, he was active in sports.
②when作"当……的时候"解,可以指较短的(一点)时间,也可指一段时间。如:When I was at college, I could speak several foreign languages. When the clock struck twelve, I had slept for 2hours.
③ while常表示一段较长的时间或一个过程,强调主句谓语动词与从句谓语动词同时发生。如:Work while you work. Play while you play.
2. As =Since 作"既然"、"由于"解,引导原因状语从句,常用来表示已为人们所知或显而易见的原因或理由。如: As he’s been ill for ages, I will help him.
As / Since you're not feeling well, you may stay at home.
As he wasn't ready , we went without him.
3. As =in the way that作"像"、"按照……的方式"解,引导方式状语从句。如:
Do as I told you.
Remember, you must do everything as I do.
4. 用于as--- as或not / so/ as ---- as中,前一个as是副词,后一个as是连词,引导比较状语从句。如:They helped the old as much as possible.
I don't speak English so/ as well as she does.
5. 表示虽然,尽管 等,引导让步状语从句,常用倒装语序,模式为:
adj. /adv. / n.+as +主语+谓语+主句。如: Young as he is, he knows much.
Tired as they were, they walked on.
6. 表示也------一样。 She is a doctor, as was her husband.
（二）、 as作关系代词,引导定语从句,表示正如,这一点.如:
He is very careful, as we all know.
As is well-known, Taiwan belongs to China.
另外,当先行词被the same, such等词修饰时,常用as来引导定语从句。如:
Such a clever girl as she can learn anything quickly.
I was reading the same book as he bought yesterday.
（三）、as作介词的用法.
1.表示好像。如:He dressed as a policeman.
2. 表示作为当作。如：I found a job as a guide.
3. 当某人是某身份时。如：As a child , she was sent to abroad.
4. as引导的介词短语大多用作状语,as译为"作为";少数情况可引起宾语补足语。如:
As a Party member, I'll take the lead in everything. (状语)
She works as a model. (状语)
She has me as one of her best friends.(引起宾语补足语)
（四）、作副词的用法 1 表示与------等同。如：This dress is twice as expensive as that one. 2 像，如等。如：As before, he remained unmoved.
总之，通过以上的分析，我们对as的词性和用法有了比较全面的理解和把握，才能在实际的运用中做到心中有数，应付裕如。
参考资料： http://zhidao.baidu.com/question/77209188.html
2.这是定语从句 what 不能引导定语从句 只能引导名词性从句 故不能
3因为定从谓语spent缺宾语 必须用关系代词充当 所以不能用关系副词
4.In that case那么着 这是字典上的翻译
5. 同1题一样
6. that引导的是定语从句 修饰先行词who
7. 因为有逗号 无and 所以错 ，and one of them....= ,one of whom....前者是并列的 简单句 后者是 非限制性定语从句
8.因为这是turn to sb 句型 whom 作介词to的宾语。
9. 因为意思不一样 where 引导的是 非限制性定语从句 先行词是Magnolia 如果用 when 先行词是 2012 但与 some time later 重复 故 不妥10 Except是介词 when 引导名词性从句 作介词宾语 意思是 除 ，，时之外In order that引导 目的状语从句 意思是 为了。。。。
2.不能，已有先行词much
3不行，因为that作为spent的宾语
4.在那情况下
5. 不行。同1
6. 因为先行词为who.故应用that,而不宜再用who
7. One of them 就对了。（另开始一句，首字母大写）或one of whom也对（定语从句）
8.to 为介词，介词后用宾格，本身是turn to的宾语。
9. 估计你打错词了，应为some time later,这本身表示时间，句子可分解成：
She became a manager of a big company some time later in Magnolia.故用where
