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关系代词 whichas的区别

我们都知道, whichas都可以引导非限制性定语从句,有时可以互换使用。但两者的用法又有所不同。何时用 which,何时又必须用 as?是不是有些傻傻分不清来来来,今天就把这个问题一次拎清~~~

( 1)位置上, as可放在句首、句末,也可插入主句中; which一般放在主句之后(有时也可用 as):

As we all know, reading is very important.

Reading is very important, which we have already known when we were very young.

( 2)意义上, as有正如、按照、正像之意,一般用在肯定句中; which可用于含肯、否定意义的句子中:

He failed in the exam again, as was expected.

He failed in the exam again, which was unexpected.

( 3)当定语从句所修饰的主句内容是谓语动词的对象时,常用 as,如:

Jack was admitted into the university, as we had expected.

( 4)固定结构,用 as

as has been said before as often happens

as is well known as we all can see

the same... as such... as

( 5)当关系代词代表主句引起的结果,又做主谓宾补 (SVOC)结构中的主语时,多用 which

He passed the exam, which made him delighted.

( 6)在从句中作介词宾语时,用 which,如:

They went to the zoo, after which they saw a film.

( 7)在从句中代表主句中的谓语的整个概念时,常用 which,如:

He can write a letter in English, which I cannot.

( 8)指代主句中某一名词时,多用 which,如:

Beijing, which he was born, is our capital.

( 9)代替主句中的形容词时,常用 which,如:

Lily thought me clever, which she herself was.

在定语从句中,相比于 which VS thatwho VS that,我们对 whichas两者区别的关注度要少很多,在遣词造句或是口语表达中,也常常是“跟着感觉走”。希望本篇能帮助大家减少关系代词的错用,从而准确清晰地掌握关系代词这一语法点~~~