第15講：狀語從句
狀語從句是句子的狀語由一個從句充當，來修飾主句中的動詞，形容詞或副詞等。狀語從句都由從屬連詞引導，與主句連接，放在句末時，一般不在前面加逗號。
狀語從句根據它表示的意思可分為時間，原因，條件，比較，結果，目的等類。下面我們揀重點的一個一個來分析。
時間狀語從句：是由when, as, while, after, before, since, until, as soon as 等從屬連詞引導的狀語從句。時間狀語從句中的謂語動詞不能用一般將來時，只能用一般現在時表示將來發生的動作或存在的狀態。 如:I will call you as soon as I arrive there.
原因狀語從句： because, since, as和for都表示原因。常常令我們不知該用哪個好。我們來比較一下。because語勢最強，回答why提出的問題，用來說明人所不知的原因。當能夠很明顯的看出原因或人們已知原因，就用as或since。如：I don't like that coat,because the color looks terrible. 由because引導的從句如果放在句末，且前面有逗號，則可以用for來代替。但如果不是說明直接原因，而是多種情況加以推斷，就只能用for。如：He is not here, because / for his mother is ill.
目的狀語從句：表示目的狀語的從句可以由in order that, so that,等詞引導。如：You must raise your voice so that/in order that everybody can hear you clearly.
結果狀語從句：結果狀語從句常由so...that 或 such...that引導，要掌握和區分這兩個句型，首先要了解so和such后面分別跟什么詞。such是形容詞，修飾名詞或名詞詞組，so是副詞,只能修飾形容詞或副詞。so 還可與表示數量的形容詞many, few, much, little連用，形成固定搭配。如：The box is so heavy that I can't carry it.
讓步狀語從句：是由though, although 引導的狀語從句。though, although 和 but不能同時使用。
Although it rained, they had a good time.
練習：
1. She will find him a kind man when she _________him.
A. knows
B. know
C. will know
D. is going to know
2. We'll go out for a walk as soon as it ________.
A. stops raining
B. raining
C. stop to rain
D. rain
3. The film was _____ interesting _____ everyone wanted to see it again.
A. too, to
B. so, that
C. not ,until
D. very, that
4. We don't understand the passage ______ there is few words in it.
A. and
B. if
C. though
D. because
5. You are sure to pass the exam _______ you study hard.
A. if
B. though
C. that
D. when
6. If you _____ free tomorrow, we won't go for a picnic.
A. aren't
B. won't be
C. weren't
D. don't
7. What was Jim doing _______ the teacher came in?
A. while
B. and
C. when
D. but
8. You must stop ______ the policeman say: "stop!"
A. that
B. if
C. then
D. until
9. --The boy failed to pass the English examination.
--______ he didn't work hard.
A. If
B. Because
C. When
D. So
10. I'll go for a walk with you if it ______ tomorrow?
A. won't rain
B. doesn't rain
C. will rain
D. rain
實踐：
1. I get up ______ half past six every day.
A. in
B. on
C. at
D. for
2. I heard Robin ________ an English song last night.
A. sang
B. to sing
C. sing
D. sung
3. Is there _______ in today's newspaper?
A. important something
B. something important
C. important anything
D. anything important
4. _____ fine weather it is!
A. What a
B. What an
C. How
D. What
5. "Where are your bikes?"
"________ is under tree, and _______ beside the wall."
A. Mine, her
B. Me, his
C. Mine, his
D. His, her
6. ______ students listened to the report.
A. Four hundred
B. Four hundred of
C. Four hundreds of
D. Four hundreds
7. Football was once a ______ game, but now more and more girls enjoy playing it.
A. boys'
B. boy's
C. boys's
D. girl's
8. Don't move, _______ I will kill you!
A. and
B. or
C. so
D. but
9. There is _________ ink in my pen. Will you please give me _______ drops?
A. a few, a little
B. few , little
C. little, a few
D. little, a little
10.They could hardly believe it, _______?
A. couldn't they
B. could they
C. can't they
D. can they
11."May I smoke here ?" "No, you _______."
A. can't
B. needn't
C. mustn't
D. may not
12.His father ________ for six years.
A. has died
B. has been dead
C. has dead
D. has been death
13.There is ________ umbrella in the room. _______ umbrella is in the corner.
A. the, the
B. a, The
C. an, The
D. an, A
14.It was ______ the Christmas Eve that I first saw him.
A. at
B. in
C. on
D. by
15.She has an pencil in one hand, a pen in ________.
A. others
B. another
C. the other
D. the others
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