大学英语三级语法大全(8)

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可引导非限制性从句，常带有'正如'。 As we know, smoking is harmful to one's health. 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。

介词+关系词

1）介词后面的关系词不能省略。 2）that前不能有介词。

3）某些在从句中充当时间，地点或原因状语的"介词+关系词"结构可以同关系副词 when 和where 互换。

This is the house in which I lived two years ago. This is the house where I lived two years ago.

Do you remember the day on which you joined our club? Do you remember the day when you joined our club?

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)

what/whatever; that/what; who/whoever 1）what = the thing which；whatever = anything What you want has been sent here.

Whatever you want makes no difference to me. 2) who= the person that; whoever= anyone who （错）Who breaks the law will be punished. （对）Whoever breaks the law will be punished.

（错）Whoever robbed the bank is not clear.

（对）Who robbed the bank is not clear.

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。 I think (that) you will like the stamps. What we need is more practice.

特殊词精讲

stop doing/to do

stop to do 停止，中断做某事后去做另一件事。 stop doing 停止做某事。

They stop to smoke a cigarette.他们停下来，抽了根烟。

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