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語(yǔ)法復(fù)習(xí)六：狀語(yǔ)從句
由從句擔(dān)任的狀語(yǔ)，在句子中可修飾謂語(yǔ)（或其它動(dòng)詞）、形容詞、副詞或是整個(gè)句子，它可以用來(lái)表示時(shí)間、地點(diǎn)、原因、目的、結(jié)果、條件、方式、比較、讓步等。狀語(yǔ)從句是一較大的語(yǔ)法項(xiàng)目，也是近幾年高考題中常見(jiàn)的一個(gè)重要試點(diǎn)。高考中已考查了時(shí)間、讓步、地點(diǎn)、條件、目的等狀語(yǔ)從句，這些從句仍是今后高考熱點(diǎn)，應(yīng)作充分準(zhǔn)備。同時(shí)對(duì)方式狀語(yǔ)從句也應(yīng)引起重視。
（一）時(shí)間狀語(yǔ)從句
表示時(shí)間的狀語(yǔ)從句可由when, as, while, whenever, after, before, till (until), since, once, as soon as (或the moment ), by the time, no sooner … than, hardly (scarcely) … when, every time等引導(dǎo)。
e.g. When I came into the office, the teachers were having a meeting.
He started as soon as he received the news.
Once you see him, you will never forget him.
No sooner had I gone to bed than I went to sleep.
（二）原因狀語(yǔ)從句
原因狀語(yǔ)從句是表示原因或理由的，引導(dǎo)這類從句的最常用的連詞是because, since, as , now that（既然）等，for 表示因果關(guān)系時(shí)（它引導(dǎo)的不是從句）為并列連詞，語(yǔ)氣不如because強(qiáng)。
e.g. He is disappointed because he didn't get the position.
As it is raining, I will not go out.
Now that you mention it, I do remember.
（三）地點(diǎn)狀語(yǔ)從句
引導(dǎo)地點(diǎn)狀語(yǔ)從句的連詞是where 和wherever等。
e.g. Sit wherever you like.
Make a mark where you have a question.
（四）目的狀語(yǔ)從句
引導(dǎo)目的狀語(yǔ)從句最常用的詞（組）是so, so that（從句謂語(yǔ)常有情態(tài)動(dòng)詞）, in order that, in case（以防，以免）等。
e.g. Speak clearly, so that they may understand you.
She has bought the book in order that she could follow the TV lessons.
He left early in case he should miss the train.
（五）結(jié)果狀語(yǔ)從句
結(jié)果狀語(yǔ)從句是表示事態(tài)結(jié)果的從句，通常主句是原因，從句是結(jié)果。由so that （從句謂語(yǔ)一般沒(méi)有情態(tài)動(dòng)詞）, so … that, such … that等引導(dǎo)。
e.g. She was ill, so that she didn't attend the meeting.
He was so excited that he could not say a word.
She is such a good teacher that everyone admires her.
（六）條件狀語(yǔ)從句
條件狀語(yǔ)從句分真實(shí)性（有可能實(shí)現(xiàn)的事情）與非真實(shí)性（條件與事實(shí)相反或者在說(shuō)話者看來(lái)不大可能實(shí)現(xiàn)的事情）條件句。引導(dǎo)條件狀語(yǔ)從句的詞（組）主要有if, unless, so (as) long as, on condition that, so (as) far as, if only ( = if )。注意：條件從句中的if 不能用whether替換。
e.g. If he is not in the office, he must be out for lunch.
You may borrow the book so long as you keep it clean.
So far as I know（據(jù)我所知）, he will be away for three months.
You can go swimming on condition that ( = if ) you don't go too far away from the river bank.
If he had come a few minutes earlier, he could have seen her.
（七）讓步狀語(yǔ)從句
讓步狀語(yǔ)從句可由although, though, as, even if (though), however, whatever, whether … or, no matter who (when, what, …) 等引導(dǎo)。注意：as引導(dǎo)的讓步狀語(yǔ)從句一般是倒裝的。
e.g. Though he is a child, he knows a lot.
Child as he is, he knows a lot.
Whatever ( = No matter what ) you say, I'll never change my mind.
（八）方式狀語(yǔ)從句
方式狀語(yǔ)從句常由as, as if (though), the way, rather than等引導(dǎo)。
e.g. You must do the exercise as I show you.
He acted as if nothing had happened.
（九）比較狀語(yǔ)從句
比較狀語(yǔ)從句常用than, so (as) … as, the more … the more等引導(dǎo)。
e.g. I have made a lot more mistakes than you have.
He smokes cigarettes as expensive as he can afford.
The busier he is, the happier he feels.
（十）使用狀語(yǔ)從句時(shí)要注意的幾個(gè)問(wèn)題
1、在時(shí)間和條件（有時(shí)也在方式、讓步等）從句中，主句是一般將來(lái)時(shí)，從句通常用一般現(xiàn)在時(shí)表示將來(lái)。
e.g. We'll go outing if it doesn't rain tomorrow.
I'll write to you as soon as I get to Shanghai.
2、有些時(shí)間、地點(diǎn)、條件、方式或讓步從句，如果從句的主語(yǔ)與主句主語(yǔ)一致（或雖不一致，是it），從句的謂語(yǔ)又包含動(dòng)詞be ，就可省略從句中的"主語(yǔ) + be"部分。
e.g. When (he was) still a boy of ten, he had to work day and night.
If (you are) asked you may come in.
If (it is) necessary I'll explain to you again.
3、注意區(qū)分不同從句：引導(dǎo)的是什么從句，不僅要根據(jù)連詞，還要根據(jù)句子結(jié)構(gòu)和句意來(lái)判別。以where為例，能引導(dǎo)多種從句。
e.g. You are to find it where you left it.（地點(diǎn)狀語(yǔ)從句）
Tell me the address where he lives.（定語(yǔ)從句，句中有先行詞）
I don't know where he came from.（賓語(yǔ)從句）
Where he has gone is not known yet.（主語(yǔ)從句）
This place is where they once hid.（表語(yǔ)從句）
練習(xí)、狀語(yǔ)從句
一、用橫線劃出下列句子中的狀語(yǔ)從句，并指出是哪種狀語(yǔ)從句：
1. Child as she is, she knows a lot of things.
2. The more I can do for the class, the happier I'll be.
3. He talks as if (as though) he knew all about it.
4. He is such a good teacher that the students love and respect him.
5.I shall go to the park unless it rains.
6. No sooner had I got home than it began to rain.
7. Where there is water, there is life.
8. He studied hard so that he could catch up with his classmates.
9. Since you are very busy, I won't trouble you.
10. Even if (though) I fail. I'll never lose heart.
11. Once you begin the work, you must continue.
12. I will find her wherever she may be.
13. Now that you've come, you'd better have dinner with us.
14. He was so excited that he couldn't fall asleep.
15. We must do everything as he tells us.
16. India is much bigger than Japan.
17. No matter when you come, you are warmly welcome.
18. As (So) long as you work hard, you can catch up with the other classmates.
二、用適當(dāng)?shù)倪B詞填空：
1. Dr. Bethune (白求恩) came to China __________ he was fifty.
2. He began to work __________ he got there.
3. Let's begin our meeting __________everyone is here.
4. I like the English people, __________ I don't like their food.
5. __________ you go in China, you can see smiling faces.
6. He didn't come to the lecture, __________ he was very busy.
7. __________we had enough time, we walked to the cinema.
8. They will help you __________ you meet with difficulty.
9. _________ we came to the university, we have learnt quite a lot.
10.I didn't join them yesterday evening __________ I had to go to an important meeting.
11. We would try to get a car __________we could all travel together more easily.
12. She wouldn't forget her mother's birthday __________ she seldom wrote to her family.
13. We're doing everything we can to make things as easy for you ___________we can.
14. The meeting became so disorderly __________ the speaker had to shout the audience down.
15. He was angrier __________ ever before.
16. __________ you lock all the doors, he can still manage to get in.
17. The boy was so tired __________ he fell asleep on the bus.
18. Hard _________ he tried, he couldn't force the door open.
三、選擇填空：
1. I'll let you know ____ he comes back.
A. before B. because C. as soon as D. although
2. She will sing a song ____ she is asked.
A. if &n
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