状语从句常见考点（一）时间状从
1.when/while/as
1) when：
①sb was doing sth when sth happened.
②sb was about to do sth when sth happened.
③sb was on the point of doing sth when sth happened.
④sb had (just/already) done sth when sth happened
⑤when=since (既然）
Eg: Why did you go to the restaurant when you can easily cook at home?
⑥when=while=although (引导让步状语从句）
2)while:
①while引导时间状从时，后面只能使用延续性动词,后面通常用进行时态，也可以使用一般时态。
While/When/As sb was doing sth, sth happened.
=Sb was doing sth when sth happened.
②while放于两个分句中间表示对比，“然而”: A, while B.
注：A, B两个分句结构一般要满足对称原则。
③while=although, 放于句首，引导让步状语从句。
Eg: While I admire him as a doctor, I don't like him as a person.
While his idea sounds reasonable, not all the people agree to it.
3）as:
①引导时间状从，后面接延续动词和瞬间动词均可。
②引导时间状从，还有“随着...”的意思，此时，要注意和with构成的非谓语结构的用法差异：
翻译：a. 随着社会的发展，保护环境变得愈发重要。
b. 随着互联网的普及，很多人的网购梦想变成了现实。
③引导时间状从，还有“一边...,一边...”的意思。
④引导比较状从：
A.... as +adj/adv + as 或... as +adj + a/an + sl. + as
B....not as (so) + adj/adv + as
Eg: The project was completed earlier than we had expected/than (it was) expected.
C. ...as many/much + n. as ...
⑤引导方式状从：
Eg: Now they lived a very happy life as they wished.
注：Just as ..., so ...
翻译：正如鱼离不开水一样，人类生活同样离不开空气。
⑥引导让步状从：adj/adv/v./n. +as/though +主谓，主句.
翻译：
a. 尽管这道题难度很大，我仍然打算把它算出来。
b. 虽然他还是个小孩，但是他相当的能干。
c. _____________ as a doctor, I don't like him as a person.
A. I admire him much
B. How much I admire him
C. Much as I admire him
D. As I admire him
⑦引导原因状从，“由于”：
2. before：
①要就多久才...:
It will be long/a long time before sb does sth.
It was long/a long time before sb did sth.
Or: It will take long/a long time before sb does sth.
It took long/a long time before sb did sth.
翻译：过了很长时间我才意识到英语语法学习的重要性。
②没过多久就...:
It won’t be long/a long time before sb does sth.
It wasn’t long/a long time before sb did sth.
Or: It won't take long/a long time before sb does sth.
It didn't take long/a long time before sb did sth.
翻译：你不用担心，他过不了多久就会回来的。
③过去发生的两个动作有明显先后关系时：
…had done sth. (for a long time) before …did…
翻译：我进入中学前已经学了三年的英语了。
④当过去发生的两个动作相继发生，间隔时间很短时：
… did …before sb did sth.
… did …before sb could do sth.
翻译：在我来不及接电话之前，他就把电话挂了。
3. since：
①…have/has done sth. since …did…
②It is/has been three years since sb did sth.
③It was three years since sb had done sth.
4.time:
a. Every/Each time A, B.
b. Next time A, B.
c. The first/last time A, B.
d. B y the time …did…, …had done…
By the time …does…, …will have done…
e. It's the first/second time (that) sb has done sth.
It was the first/second time that sb had done sth.
PS: By 2006, …had done…
By now, …have/has done…
By 2012, …will have done…
5. 一…，就…：
①As soon as A, B.
The moment/minute/instant A, B.
Immediately/directly/instantly A, B.
②No sooner had sb done sth than …did…
Hardly/Scarcely had sb done sth be fore …did…
③On/Upon doing sth, sb. …
At the sight/thought/sound of sth, sb….
6. until:
①放于陈述句时，句中动词须为延续性动词：
②放于否定句时，句中动词须为瞬间性动词：
③It was not until …that …did…
④Not until ... did sb do sth.
请用三种方式翻译以下句子：
昨天直到他回到家我才知道事情的真相。
A.___________________________________________.
B.___________________________________________.
C.___________________________________________.。