定语从句经典题目(7)

2021-01-20 22:16

(2) as 代表前面的整个主句并在从句中作主语时,从句中的谓语必须是系动词;若为行为动词,则从句中的关系代词只能用which.。在本题中,prevent由于是行为动词,所以正确选项应为B。

as 的用法

例1. the same…as;such…as 中的as 是一种固定结构, 和……一样……。例如: I have got into the same trouble as he (has). 我碰到了跟他一样的麻烦。

例2. as可引导非限制性从句,常带有'正如'。例如:

As we know, smoking is harmful to one's health. 如我们所知,吸烟有害健康。 As is known, smoking is harmful to one's health.

As是关系代词。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。

7 先行词和关系词二合一

1) Whoever spits in public will be punished here. (Whoever 可以用 anyone who 代替)

2) The parents will use what they have to send their son to technical school.(what 可以用all that代替)

8 what/whatever; that/what; who/whoever

1)what = the thing which;whatever = anything。例如:

What you want has been sent here. 你要的动词都送来了。

Whatever you want makes no difference to me. 不管你要什么,跟我没什么关系。

2) who= the person that whoever= anyone who。例如:

(错)Who breaks the law will be punished.

(错)Whoever robbed the bank is not clear.

(对)Whoever breaks the law will be punished. 王子犯法,与庶民同罪。

(对)Who robbed the bank is not clear. 谁抢了银行还不清楚。

3) that 和 what

当that引导定语从句时,通常用作关系代词,而引导名词性从句时,是个不充当任何成分的连接词。宾语从句和表语从句中的that常可省略。What只能引导名词性从句, 用作连接代词,作从句的具体成分,且不能省略。例如:

I think(that)you will like the stamps. 我想你会喜欢这些邮票的。

What we need is more practice. 我们需要的是更多的实践。

9 关系代词that 的用法

1)不用that的情况

a) 引导非限定性定语从句时。例如:

(错)The tree, that is four hundred years old, is very famous here.


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