高中語法專練：iv. 原因狀語從句

iv. 原因狀語從句

1. because意為“因為”。

1）回答why引出的疑問句，只能用because回答。

—Why did you come late?

—Because I missed the bus.

——你為什么來晚了呢？

——因為我沒有趕上公交車。

2）對原因狀語從句強調時，只能強調because引導的狀語從句。

It was because he didn't obey the rule that he was punished.

他正是因為不遵守規(guī)章而受了懲罰。

3）在only, just, simple等強調詞后，只能用because。

He didn't learn English well just because he didn't work hard at it.

他沒有學好英語只是因為他沒有下功夫學。

4）與not連用，構成并列because分句時，只能用because。

He didn't come to the party, not because he refused to, but because he was badly ill.

他沒有來參加晚會，不是因為他拒絕來，而是因為他得了重病。

2. as意為“由于”，語氣比because弱。

As it is going to rain , we'd better hurry up.

由于天要下雨了，我們最好快點吧。

3. since=now that意為“既然”，通常位于句首。

1）since引導的從句總是位于主句前面。

Since you say so , I suppose it is true.

既然你這么說，我就假設它是真的。

2）表示明顯的原因或事實。

Since everyone may make mistakes in life , we will give him a chance.

既然每個人一輩子都會犯錯誤，我們就給他一次機會吧。

3）now that具有時間概念，所引導的從句中的謂語動詞多為現(xiàn)在時態(tài)。

Now that you are old enough to judge things, you'd better decide what to do next.

既然你大了能夠做出判斷了，你最好決定下一步做什么吧。

4. for意為“因為”。

1）經(jīng)常把結果當原因，即用于倒果為因的說法，為主句所說的話提供推斷的理由。

Someone in the house must be ill, for the doctor has just come out .

房子里一定有人病了，因為醫(yī)生剛剛從里面出來。

2）for引導的從句只能放在主句后面，而且需要逗號與主句隔開。

He must have seen the film, for he knows so much about it .

他肯定看過那部電影，因為他對那部電影了解很多。

5. in that是復合連詞，意為“因為；在于，在……方面”。

He didn't go abroad for further study in that he couldn't afford to do that.

他沒有出國深造在于他付不起出國的錢。

6. considering that= seeing that意為“既然……；考慮到……”。

Considering that he was badly ill, he shouldn't keep on working so hard.

既然他病的那么重，就不應該繼續(xù)那么賣勁兒工作了。

7. 介詞短語+ that

1）on the grounds that ...

He left on the grounds that he was ill.

他以生病為由離開了。

2）for the reason that ...

He cannot be charged with murder for the simple reason that he was not in town when the crime was committed.

他不可能被指控謀殺，原因很簡單：案發(fā)時他不在城里。

3）by reason that ...

He was not severely punished for his crime by reason that he was very young.

他沒有因其犯罪而受到嚴厲懲罰因為他很年輕。

4）for fear (that) ...

Shut the window for fear that it may rain.

關上窗戶以防下雨。

8. 復合介詞+the fact that ...

1）on account of the fact that ...

On account of the fact that all the trains were delayed, the station was crowded with people.

由于所有火車都晚點了，火車站里擠滿了人。

2）in the view of the fact that ...

We had to speed up in view of the fact that we had no time left.

我們只好加速，因為我們沒有時間了。

3）Owing to the fact that ...

Owing to the fact that I had lost his address, I did not know where I could find him.

由于丟了他的地址，我不知道在哪里能找到他。

4）Because of the fact that ...

Because of the fact that they got to the airport too late, they could not buy the tickets they wanted.

由于到機場太晚，他們未能買到想要的票。

5）Due to the fact that ...

In summer very few visitors travel in Africa due to the fact that the weather is extremely hot.

由于天氣很熱，夏天非洲游客很少。

專項練習

1. Parents should take seriously their children's request for sunglasses _______ eye protection is necessary in sunny weather.

A. because

B. though

C. unless

D. if

2. _______ the weather was fine, I opened all the windows.

A. As

B. Because of

C. For

D. With

3. _______ you wouldn't like to go there, you might as well stay here.

A. Even if

B. Even

C. Now that

D. Although

4. _______ time went on, what our teacher said proved true.

A. As

B. Since

C. With

D. Because

5. He married _______ he loved her but because he was indebted to her.

A. because not

B. not because

C. because

D. though

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