4. so/such...that(如此……以致……)结构中，so 或such位于句首加强语气时，主句用部　　　　　　分倒装语序。

　 例如：So difficult _____ it to work out the problem that I decided to asked Tom for advice.

　　　 A. I did find　　 B. did I find　　 C. I have found　　 D. have I found

　 简析：该句的正常语序是I found it so difficult to work out the problem that I decided to ask Tom for advice .

3. 表示“一……就……”的两个常见结构 “no sooner ．．．than...”和“hardly...when...”，当no sooner和“hardly位于句首时，主句用部分倒装语序，且用过去完成时态。

　 例如：--- Did Linda see the traffic accident?

　　　 --- No, no sooner ______ than it happened.

　　　 A. had she gone　　 B. she had gone　　 C. has she gone　　 D. she has gone

2. not until 从句被提到句首时，主句用部分倒装语序，从句语序不变。

　 例如：Not until all the fish died in the river ______ how serious the pollution was.

　 A. did the villagers realize　　　　　 B. the villagers realized

　 C. the villagers did realize　　　　　 D. didn't the villagers realize

1. “only + 状语从句”位于句首，主句用部分倒装语序，从句语序不变。

　 例如：Only when the war was over ______ to his hometown.

　 A. did the young soldier return　　　 B. the young soldier returned.

　 C. returned the young soldier　　　　 D. the young soldier did return

5．可引导时间状语从句的time 短语：

every time, each time, (the) next time, (the)last time, by the time, the first time, any time等以time结尾的短语可引导从句。如：

(8)I thought her nice and honest 　　　I met her.

A. first time　 B. for the first time　 C. the first time　 D. by the first time

解析：选项中只有the first time可引导时间状语从句，故选C。

4．表示“一……就……”的四类从属连词：

as soon as= the moment(that); = the minute(that ); = the second(that); = the instant(that );

= immediately(that); = directly(that); = instantly(that);

= no sooner…than…; = hardly…when….如：

(7) –Did you remember to give Mary the money you owed her ?

　 –Yes ,I gave it to her 　　I saw her.

A．while　　 B. the moment　 C. suddenly　 D. once

解析：选B，句意是“我一看见她就还给她了”，故选B。虽然once也可表示“一……就……”但含有很强的条件意味，即“一旦”，不合语境。

3．until 和till 的用法：

与肯定式的主句连用，主句谓语必须是延续性动词，till/ until表示“……直到……”；与否定式的主句连用，且主句谓语是结束性动词时，till/ until表示“直到……才……”。如：

(5)We were told we should follow the main road_____ we reached the central railway.

A. whenever　　 B. until　 C. while　 D. wherever

解析：选B，句意为：有人告诉我们，我们应当沿着这条主道往前走，直走到中心火车站。

(6)-Was his father very strict with him when he was at school ?

　　 -Yes .He had never praised him____ he became one of the top students in his grade.

A. after　 B. unless　 C. until　 D. when

解析：选C，句意为：直到他成为全级最优秀的学生，他父亲才表扬他。

2. before 的用法：

before的本意为“在……之前”，根据具体语境还可理解为“还没来得及/还没有……就……，趁着还没……就……，不知不觉就……，……才……”等。如：

(3)The American Civil War lasted four years _____ the North won in the end .

A. after　 B. before　 C. when　 D. then

解析：美国内战“在北方获胜之前”延续了四年，故选B。

(4)Someone called me up in the middle of the night, but they hung up ______ I could answer the phone.

A. as　　 B. since　 C. until　 D. before　

解析：选D，句意为：有人半夜打来电话，但是我还没来得及接，对方就挂了电话。

笔者根据近年高考试题，将状语从句的考点作了较为全面的归纳，让考生在复习备考时，明确状语从句在高考中究竟考什么、怎样考。

考点一：时间状语从句

1. when ,while ,as 的用法：

when 意为“当/在……时，每当”；

while意为“在……期间”，从句的谓语必须是延续性动词；

as意为“一边……一边……，随着”，动词通常为动作动词。如：

(1)He transplanted the little tree to the garden _______it was the best time for it .

A. where　 B. when　 C. that　 D. until

解析：选B，when 引导时间状语从句，句意为：在最合适的时候，他将小树移植了。

(2)-----I，m going to the post office.

-----_____ you’re there ,can you get me some stamps?

A. As　　 B. While　 C. Because　 D. If

解析:　 虽然as和while都可表示“在……期间”，但as要与动作动词连用，而本题的“are there”是状态，不是动作，只能用while，故选B。