英語語法狀語從句
狀語從句在復合句中作狀語，修飾動詞、形容詞或副詞等。狀語從句可以表示時間、條件、原因、地點、目的、結果、讓步、方式、比較等意義。
知識梳理：提綱挈領，抓住重點和難點！
各類狀語從句連接詞（短語）一覽表：
時間when, while, as, as soon as, since, until, after, before
條件If, unless
原因As, because, since
地點Where
目的So that, in order that
結果So that, so…that, such…that
讓步though, although, even if, however
方式As
比較than, (not)as…as,
時間狀語從句：
Whenever he comes, he brings a friend. 他每次來都帶個朋友。
條件狀語從句：
As long as I am alive, I will go on studying. 只要我活著， 我就要學習。
原因狀語從句：
Since we live near the sea, we enjoy nice weather.由于我們住在海邊，能享受到好的天氣。
地點狀語從句：
Put it where we can all see it.把它放在我們都能看到的位置。
目的狀語從句：
Finish this so that you can start another.把這個做完，你可以開始另一個。
結果狀語從句：
He was so angry that he couldn‘t say a word. 他氣得說不出話了。
讓步狀語從句：
Though he is in poor health, he works hard.雖然他身體不好，但是他工作很努力。
方式狀語從句：
Students do as the teachers say.學生們按照老師說的去做。
比較狀語從句：
The work isn‘t as easy as I thought.這項工作比我想象得難。
例題解析：舉一反三，學的更輕松！
易混引導詞while, when, as的區(qū)別：
when既可以指時間點,與瞬間動詞連用，也可以指時間段，與延續(xù)性動詞連用（=while）。如：
When he came in, his mother was cooking.
When (While) we were at school, we went to the library every day.
While表示時間段,因此，while 從句的謂語動詞要用延續(xù)性動詞。如：
Please don‘t talk so loud while others are working.
As與when用法相似，但著重強調(diào)主句動作與從句動作同時發(fā)生，有隨著……或一邊……一邊……之意。如：
As you get older, you get more knowledge.隨著年齡的增長，你獲得的知識就越多。
2．Because,as,since 的區(qū)別：
Because用于表示直接原因,回答why提出的問題，語氣最強；As用于說明原因, 著重點在主句，常譯成由于；since表示顯然的或已知的理由或事實，常譯成既然。如：
Water is very important because we can‘t live without it.
He didn‘t come yesterday as his mother was ill.
I‘ll do it for you since you are busy.
3．such…that, so…that, so that 引導結果狀語從句的區(qū)別：
such是形容詞，修飾名詞; so 是副詞，修飾形容詞或副詞。其結構
1) such + a (n)+ 形容詞+單數(shù)可數(shù)名詞+that……
2) such+形容詞+復數(shù)可數(shù)名詞+that ……
3) such +形容詞+不可數(shù)名詞+that……。如：
This was such a good film that I went to see it several times.
It was such good books that they sell well.
It was such bad weather that I had to stay at home.
He spoke so fast that I couldn‘t follow him.
He is such a lovely boy that we all like him.
=He is so lovely a boy that we all like him.
注：在形容詞+可數(shù)名詞復數(shù)/不可數(shù)名詞結構中，當名詞前有many, much, few, little表示數(shù)量的多少時，名詞前用so。如：
She made so many mistakes that she didn‘t pass the exam.
練習與鞏固：熟能生巧，取得好成績！
選擇合適的連接詞，完成下列句子。
1.Jim spends a lot of money on books______he is not rich.
2.Kate fell into sleep ______she was listening to the music.
3.----Is David at school today?
----No. He is at home ______he has a bad cold.
4.We won‘t have supper ______my mother comes back.
5.Speak to him slowly ______he may understand you better.
6. ______ she doesn‘t come on Sunday, I‘ll go fishing by myself.
7.It is four years ______I had left that small village.
8. ______the air moves, it is called wind.
9.We will go to the park ______it doesn‘t rain tomorrow.
10.______little boys did ______much work.
11.There are few new words in the passage ______we can‘t understand it.
12.Go back ______you come from.
13.He reached the station ______the train had left.
14.----Do you have a swimming pool?
----No, we don‘t. At least, not ______big ______yours.
15.Give me your paper ______you have finished it.
16.It is raining hard, ______we have to stay at home.
17. ______you work harder, you‘ll never pass the final exam.
18.Look after te children ______I am out.
19.The village is ______far away ______I can‘t get there on foot.
20.That is ______an interesting book ______I can‘t stop reading it.
Keys: 1.though 2.while 3.because 4.until 5. so that
6.Even if 7.since 8.when 9.if 10.Such, do
11.but 12.where 13.before 14.as(so), as15.after
16.so 17.unless 18.while 19.so, that 20.such, that
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