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状语从句是高考单项选择必考题目之一，试题设计越来越灵活，设问角度多样。要熟练掌握状语从句的作用和意义，分清句子结构和句子间的关系，熟悉设题陷阱，才能有的放矢。
陷阱一 利用状语从句易混淆连接词设干扰项
高考考查热点在引导状语从句的连词上。引导时间状语从句的连词有：when, whenever, as, while, after, since, as soon as, till, until, hardly…when, no sooner…than, the moment, the minute, the instant, the day /the week /the year, every /each time, the first /second time, next time, immediately, instantly, directly等；
引导原因状语从句的连词有：because, as, since, now that, when；
引导地点状语从句的连词有：where, wherever；
引导条件状语从句的连词有：if, unless, so long as, on condition that, in case, while, suppose /supposing, provided /providing that 等；
引导让步状语从句的连词常有：although, though, as, even if/though, no matter how /what /where/when /who..., whatever, whoever, whenever, wherever, however等；
引导目的状语从句的连词有：so that…, in case, for fear that…, in order that…；
引导结果状语从句的连词有：so that, so…that, such…that…等；
引导比较状语从句的连接词有：as...as, than, the more…, the more…等。
1. You should make it a rule to leave things ______ you can find them again.
A. when B. where C. then D. which
解析：易误选D。最佳选项 B。where 在此引导地点状语从句，其意为“(在)……的地方”。
2. 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：易误选A。最佳选项B。when 在此意思是“既然”、“考虑到”, when = since /considering that，实质是表示一种原因。除上面提到的意思外，when 还可表示“当……的时候”、“尽管”、“虽然”。
3. He went home for lunch ______ the clock struck twelve.
A. while B. immediately C. right away D. at once
解析：易误选A。最佳选项B。immediately用作连词，意为“一……就……”，相当于 as soon as。
陷阱二 利用相似句型加大迷惑性
常见句型有：It is + 时间点 + when…, It is + 时间段+ since…, It was /will be + 时间段+ before…; such...that…, such…as…, so…that…; It is /was + 被强调部分+ that +其他
1. —Did Jack come back early last night?
—Yes. It was not yet eight o’clock ______ he arrived home.
A. before B. when C. that D. until
解析：易误选C。最佳选项B。 when引导时间状语从句，意为“他回家的时候不是八点钟”。
2. His plan was such a good one ______ we all agreed to accept it.
A. so B. and C. that D. as
解析：易误选D。最佳选项C。本题考查such….that引导的结果状语从句。
3. It was after he got what he had desired ______ he realized it was not so important.
A. that B. when C. since D. as
解析：易误选B。最佳选项A。本题考查强调句型，正常语序是：He realized it was not so important after he got what he had desired.
陷阱三 利用状语从句中的时态、语态、语气、语序、省略等设置干扰项
1. The old man runs very fast as if he ______ a young man.
A. is B. was C. were D. will be
解析：易误选A。最佳选项C。考查as if 引导的状语从句中，常用虚拟语气，be动词用were。
2. ______ he has limited technical knowledge, the old worker has a lot of experience.
A. Since B. Unless C. As D. Although
解析：易误选C。最佳选项D。although引导的让步状语从句不倒装，意为“尽管….”。as引导的让步状语从句应倒装，将从句中的表语、状语或动词原形置于句首。若表语是名词，前置时不带冠词。如：Child as he is, he knows a lot.
3. This is a very interesting book. I’ll buy it, ______.
A. how much may it cost B. no matter how it may cost
C. however much it may cost D. how may it cost
解析：易误选B。最佳选项C。考查让步状语从句的语序：however + adj. /adv. +主语+谓语。此题答案也可以用 no matter how much it may cost。
4. ______ your composition carefully, some spelling mistakes can be avoided.
A. Having checked B. Check C. If you check D. To check
解析：易误选A。最佳选项C。非谓语动词作状语时，其逻辑主语应与句子主语一致，此句的 some spelling mistakes 不是 having checked 或 to check 的逻辑主语，排除A和D；若选 B，则两个句子之间缺少必要的连词。
5. —Shall Mary come and play computer games?
—No, ______ she has finished her homework.”
A. when B. since C. unless D. as soon as
解析：易误选D。最佳选项C。此句为省略句，答句句首的 No，表明其后省略的是一个否定句，全句补充完整为：She can’t play computer games unless she has finished her homework.
陷阱四 状语从句与其他从句、句型结合起来加大干扰
1. Because of the financial crisis, days are gone ______ local 5-star hotels charged 6,000 yuan for one night.
A. if B. when C. which D. since
解析：易误选A。最佳选项B。when引导定语从句修饰days，并在定语从句中作时间状语，句意为“因为金融危机，当地五星级宾馆每晚收费6000元的日子一去不复返了。”
2. It is said that a new school will be built ______ used to be an old temple.
A. where B. in the place where C. there where D. where there
解析：几个干扰项均有可能误选，易误选A、B。最佳选项D。where引导地点状语从句，表示“在……的地方”,而在从句中应用there be句型。
3. It was ______ he came back Africa that year ______ he met the girl he would like to marry.
A. when; then B. not; until C. not until; that D. only; when
解析：易误选A。最佳选项C。考查强调句型中强调时间状语not until he came back from Africa。
巩固性练习
1. We had to wait half an hour ______ we had already booked a table.
A. Since B. although C. until D. before
2. —______ when has the country been open to international trade?
—1978, I suppose.
A. Since B. In C. From D. After
3. ______ I really don’t like art, I find his work impressive.
A. As B. Since C. If D. While
4. Many of them turned a deaf ear to his advice, ______ they knew it to be valuable.
A. as if B. now that C. even though D. so that
5. How can you expect to learn anything ______ you never listen?
A. in case B. even if C. unless D. when
6. If you are traveling ______ the customs are really foreign to your own, please do as the Romans do.
A. in which B. what C. when D. where
7. I had just stepped out of the bathroom and was drying myself with a towel ______ I heard the steps.
A. while B. when C. since D. after
8. In peace, too, the Red Cross is expected to send help ______ there is human suffering.
A. whoever B. however C. whatever D. wherever
9. ______environmental damage is done, it takes many years for the ecosystem to recover.
A. Even if B. If only C. While D. Once
10. —Mom, what did your doctor say?
—He advised me to live ______ the air is fresher.
A. in where B. in which C. the place where D. where
11. Unlike watching TV, reading is a highly active process ______ it requires attention as well as memory and imagination.
A. until B. but C. unless D. for
12. I was about to leave my house ______ the telephone rang.
A. while B. as C. when D. and
13. It is known to all that ______ you exercise regularly, you won’t keep good health.
A. unless B. whenever C. although D. if
14. Roses need special care ______ they can live through winter.
A. because B. so that C. even if D. as
15. ______ the day went on, the weather got worse.
A. With B. Since C. While D. As
16. It was nearly lunch time ______ Henry began to feel bad.
A. until B. that C. when D. while
17. Simon thought his computer was broken ______ his little brother pointed out that he had forgotten to turn it on.
A. until B. unless C. after D. when
18. He will come to call on you the moment he ______ his painting.
A. will finish B. finished C. has finished D. had finished
19. When ______, water can be turned into vapor.
A. does heat B. is hot C. heated D. is heated
20. The fire went on for quite some time ______ it was brought under control.
A. when B. since C. after D. before
Keys: 1 — 5 BADCD 6 — 10 DBDDD 11 — 15 DCABD 16 — 20 CACCD
陷阱一 利用状语从句易混淆连接词设干扰项
高考考查热点在引导状语从句的连词上。引导时间状语从句的连词有：when, whenever, as, while, after, since, as soon as, till, until, hardly…when, no sooner…than, the moment, the minute, the instant, the day /the week /the year, every /each time, the first /second time, next time, immediately, instantly, directly等；
引导原因状语从句的连词有：because, as, since, now that, when；
引导地点状语从句的连词有：where, wherever；
引导条件状语从句的连词有：if, unless, so long as, on condition that, in case, while, suppose /supposing, provided /providing that 等；
引导让步状语从句的连词常有：although, though, as, even if/though, no matter how /what /where/when /who..., whatever, whoever, whenever, wherever, however等；
引导目的状语从句的连词有：so that…, in case, for fear that…, in order that…；
引导结果状语从句的连词有：so that, so…that, such…that…等；
引导比较状语从句的连接词有：as...as, than, the more…, the more…等。
1. You should make it a rule to leave things ______ you can find them again.
A. when B. where C. then D. which
解析：易误选D。最佳选项 B。where 在此引导地点状语从句，其意为“(在)……的地方”。
2. 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：易误选A。最佳选项B。when 在此意思是“既然”、“考虑到”, when = since /considering that，实质是表示一种原因。除上面提到的意思外，when 还可表示“当……的时候”、“尽管”、“虽然”。
3. He went home for lunch ______ the clock struck twelve.
A. while B. immediately C. right away D. at once
解析：易误选A。最佳选项B。immediately用作连词，意为“一……就……”，相当于 as soon as。
陷阱二 利用相似句型加大迷惑性
常见句型有：It is + 时间点 + when…, It is + 时间段+ since…, It was /will be + 时间段+ before…; such...that…, such…as…, so…that…; It is /was + 被强调部分+ that +其他
1. —Did Jack come back early last night?
—Yes. It was not yet eight o’clock ______ he arrived home.
A. before B. when C. that D. until
解析：易误选C。最佳选项B。 when引导时间状语从句，意为“他回家的时候不是八点钟”。
2. His plan was such a good one ______ we all agreed to accept it.
A. so B. and C. that D. as
解析：易误选D。最佳选项C。本题考查such….that引导的结果状语从句。
3. It was after he got what he had desired ______ he realized it was not so important.
A. that B. when C. since D. as
解析：易误选B。最佳选项A。本题考查强调句型，正常语序是：He realized it was not so important after he got what he had desired.
陷阱三 利用状语从句中的时态、语态、语气、语序、省略等设置干扰项
1. The old man runs very fast as if he ______ a young man.
A. is B. was C. were D. will be
解析：易误选A。最佳选项C。考查as if 引导的状语从句中，常用虚拟语气，be动词用were。
2. ______ he has limited technical knowledge, the old worker has a lot of experience.
A. Since B. Unless C. As D. Although
解析：易误选C。最佳选项D。although引导的让步状语从句不倒装，意为“尽管….”。as引导的让步状语从句应倒装，将从句中的表语、状语或动词原形置于句首。若表语是名词，前置时不带冠词。如：Child as he is, he knows a lot.
3. This is a very interesting book. I’ll buy it, ______.
A. how much may it cost B. no matter how it may cost
C. however much it may cost D. how may it cost
解析：易误选B。最佳选项C。考查让步状语从句的语序：however + adj. /adv. +主语+谓语。此题答案也可以用 no matter how much it may cost。
4. ______ your composition carefully, some spelling mistakes can be avoided.
A. Having checked B. Check C. If you check D. To check
解析：易误选A。最佳选项C。非谓语动词作状语时，其逻辑主语应与句子主语一致，此句的 some spelling mistakes 不是 having checked 或 to check 的逻辑主语，排除A和D；若选 B，则两个句子之间缺少必要的连词。
5. —Shall Mary come and play computer games?
—No, ______ she has finished her homework.”
A. when B. since C. unless D. as soon as
解析：易误选D。最佳选项C。此句为省略句，答句句首的 No，表明其后省略的是一个否定句，全句补充完整为：She can’t play computer games unless she has finished her homework.
陷阱四 状语从句与其他从句、句型结合起来加大干扰
1. Because of the financial crisis, days are gone ______ local 5-star hotels charged 6,000 yuan for one night.
A. if B. when C. which D. since
解析：易误选A。最佳选项B。when引导定语从句修饰days，并在定语从句中作时间状语，句意为“因为金融危机，当地五星级宾馆每晚收费6000元的日子一去不复返了。”
2. It is said that a new school will be built ______ used to be an old temple.
A. where B. in the place where C. there where D. where there
解析：几个干扰项均有可能误选，易误选A、B。最佳选项D。where引导地点状语从句，表示“在……的地方”,而在从句中应用there be句型。
3. It was ______ he came back Africa that year ______ he met the girl he would like to marry.
A. when; then B. not; until C. not until; that D. only; when
解析：易误选A。最佳选项C。考查强调句型中强调时间状语not until he came back from Africa。
巩固性练习
1. We had to wait half an hour ______ we had already booked a table.
A. Since B. although C. until D. before
2. —______ when has the country been open to international trade?
—1978, I suppose.
A. Since B. In C. From D. After
3. ______ I really don’t like art, I find his work impressive.
A. As B. Since C. If D. While
4. Many of them turned a deaf ear to his advice, ______ they knew it to be valuable.
A. as if B. now that C. even though D. so that
5. How can you expect to learn anything ______ you never listen?
A. in case B. even if C. unless D. when
6. If you are traveling ______ the customs are really foreign to your own, please do as the Romans do.
A. in which B. what C. when D. where
7. I had just stepped out of the bathroom and was drying myself with a towel ______ I heard the steps.
A. while B. when C. since D. after
8. In peace, too, the Red Cross is expected to send help ______ there is human suffering.
A. whoever B. however C. whatever D. wherever
9. ______environmental damage is done, it takes many years for the ecosystem to recover.
A. Even if B. If only C. While D. Once
10. —Mom, what did your doctor say?
—He advised me to live ______ the air is fresher.
A. in where B. in which C. the place where D. where
11. Unlike watching TV, reading is a highly active process ______ it requires attention as well as memory and imagination.
A. until B. but C. unless D. for
12. I was about to leave my house ______ the telephone rang.
A. while B. as C. when D. and
13. It is known to all that ______ you exercise regularly, you won’t keep good health.
A. unless B. whenever C. although D. if
14. Roses need special care ______ they can live through winter.
A. because B. so that C. even if D. as
15. ______ the day went on, the weather got worse.
A. With B. Since C. While D. As
16. It was nearly lunch time ______ Henry began to feel bad.
A. until B. that C. when D. while
17. Simon thought his computer was broken ______ his little brother pointed out that he had forgotten to turn it on.
A. until B. unless C. after D. when
18. He will come to call on you the moment he ______ his painting.
A. will finish B. finished C. has finished D. had finished
19. When ______, water can be turned into vapor.
A. does heat B. is hot C. heated D. is heated
20. The fire went on for quite some time ______ it was brought under control.
A. when B. since C. after D. before
Keys: 1 — 5 BADCD 6 — 10 DBDDD 11 — 15 DCABD 16 — 20 CACCD