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as,which的初中英语练习题

线话英语|2015-05-11 16:41:30

      初中英语练习题背景资料:

       由as, which 引诱的非限定性定语从句,as和which可代整个主句,相当于and this或and that。As个别放在句首,which在句中。
As we know, smoking is harmful to one's health.
The sun heats the earth, which is very important to us.  

       初中英语练习题开始例题练习:
1)Alice received an invitation from her boss, ___came as a surprise.
A. it  B. that  C. which  D. he
答案C. 此为非限定性从句,不能用 that修饰,而用which.,it 和he 都使后句成为句子,两个独破的句子不能单以逗号衔接。况且选he句意不通。

2)The weather turned out to be very good, ___ was more than we could expect.
A. what B. which C. that D. it
初中英语常考的知识点。答案B。which可代替句子,用于非限定性定语从句,而what不可。That 不能用于非限定性定语从句,it不为连词,使由逗号连接的两个句子并在一起在英语语法上行不通。

3)It rained hard yesterday, ____ prevented me from going to the park..

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A. that B. which  C. as  D. it
谜底B.
as 跟which在领导非制约性定语从句时,这两个关系代词都指主句所表白的全部意思,且在定语从句中都可能作主语跟宾语。但不同之处主要有两点:
(1) as 勾引的定语从句可置于句首,而which不可。
(2) as 代表前面的全体主句并在从句中作主语时,从句中的谓语必须是系动词;若为举动动词,则从句中的关系代词只能用which.。
在本题中,prevent由于是行动动词,所以正确选项应为B。
     初中英语练习题的讲解:

As 的用法
例1. the same… as;such…as 中的as 是一种固定结构, 和……一样……。
I have got into the same trouble as he (has).
例2. as可引导非限度性从句,常带有'正如'。
As we know, smoking is harmful to one's health.
As is know, smoking is harmful to one's health.(较少考到的句型)
As是关联代词。例1中的as作know的宾语;例2中,它充当从句的主语,谓语动词know要用被动式。 CopyRight .com

       初中英语练习题在各大英语资料书中比比皆是,资料书只能给您来练笔,但真正让您学习和改变的还是记得收集自己的错题集。

 

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