原因结果目的状语从句讲解和练习(答案)

●原因状语从句

(1)原因状语从句通常由because, since, as,for引导。

(2)because表示直接原因，语气最强。because引导的原因状语从句多放在主句之后。回答由why提出的问题，只能用because。此外，because和so不能同用在一个句子里。

例如：------Why aren’t going there?------Because I don’t want to.

since引导原因状语从句，相当于now that，意思是“因为……，既然……，鉴于……”。

例如：Since the rain has stopped，let’s go for a walk. 既然雨停了，我们出去散散步吧。

as和since语气较弱，一般用来表示明显的原因。由as和since引导的原因状语从居多放在句首。

例如：As he has no car, he can’t get there easily.

Since we have no money, we can’t buy it.

(4)for表示所说的理由是一种补充说明,for引导的从句一般不放在句子的开头。如:

I decided to stop and have lunch, for I was feeling quite hungry.

小试牛刀：I was late for class yesterday _______ there was something wrong with my bike.

He took off his coat _______ he felt hot.

you can’t answer the question, I’ll ask som eone else.

●结果状语从句

(1)结果状语从句由so…that, such…that, so that引导。

(2)so…that语such...that可以互换。在由so...that引导的结果状语从句中，so是副词，与形容词连用。其结构是: “...so + 形容词（副词）+ that + 从句”。

例如：He was so glad that he couldn’t say a word.

Mother lives so far away that we hardly ever（几乎不，从来不）see her.

在由such…that引导的结果状语从句中，such是形容词，它修饰的可以是单数或复数可数名词，也可以是不可数名词；其结构是: “...such +a / an + 形容词+名词+ that + 从句”。

例如：It was such a hot day that nobody wanted to do anything.

He had such long arms that he could almost touch the ceiling.（天花板）

有时上述两种结构是可以互换的。

例如：It was such a wonderful film that all of us wanted to see it again.

=The film was so wonderful that all of us wanted to see it again.

(3)如果名词前由many, much, little, few等词修饰时，只能用so, 不用such。

例如：Soon there were so many deer that they ate up all the wild roses.

He has so little time that he can’t go to the cinema with you.

（4）如果主从句的主语相同，并且从句是否定的形式，可以用too...to...句型转化。

例如：He was so excited that he couldn't go to sleep that night. = He was too excited to go to sleep.

（5）如果主从句的主语相同，但从句是肯定的形式，可以用adj.+ enough替换。

例如：He is so old that he could go to school. = He is old enough to go to school.他够大了，可以去上学。

小试牛刀：It is ___ hot in the room ___ we have to go out for a walk.

It was a wonderful movie all of us wanted to see it again.

There were little water in the bottle the bird couldn’t reach it.

He is so young that he couldn’t go to school.= .

The classroom is so big that it can hold 100 person. = .

目的状语从句

(1)目的状语从句通常由so that, in order that（为了，以便）引导。

例如：We started early so that we could catch the first train.

We used the computer in order that we might save time.

(2)so that可引导目的状语从句，此时可用to或in order to替换,将其改为简单句。

例如：He got up early so that he could get to school on time.

=He got up early（in order）to get to school on time.

(3)so that既可引导目的状语从句，又可引导结果状语从句。区别这两种从句的办法有两个：1)目的状语从句里

往往带有情态动词can, could, may, might等。2)从意思上看，目的状语从句往往表示的目的很明确。

例如：Speak clearly so that they may understand you. (目的状语从句)

Jack is badly ill so that he has to rest. (结果状语从句)

小试牛刀：I hurried I wouldn't be late for class.

We should go by bus ___ we can get there earlier.

May I sit nearer I can see more clearly?

一、单项选择。

1．We’ll stay at home if it ______ tomorrow.

A．rain B．rains C．is raining D．will rain

2．We didn’t go home _____ we finished the work.

A．since B．until C．because D．though

3．She ______ when I went to see her.

A．is reading B．have read C．was reading D．reads

4．_____ the rain stops, we’ll set off for the station.

A．Before B．Unless C．As soon as D．Though

5．She looks forward every spring to ____ the flower-lined garden.

A．visit B．paying a visit C．walk in D．walking in

6．Mr. White hoped he ______ China the next year.

A．would visit B．will visit C．visited D．has visited

7．I told him that the sun ______ in the east.

A．rises B．rose C．has risen D．was rising

8．She was _____ tired _____ she could not move an inch.

A．so, that B．such, that C．very, that D．so, as

9．He was sentenced to death _____ what he had stolen from the bank.

A．that B．since C．because D．because of

10．I didn’t know what ______.

A．was the matter B．is the matter C．the matter was D．the matter is

11．I couldn’t agree with ______ at the meeting.

A．that you said B．which you said C．what did you say D．what you said

12．The bad man ran away to avoid _______ and was finally put into prison.

A．seeing B．to be seen C．being seen D．to be caught