where在定语从句中用作地点状语,其先行词是表地点的名词。如:
I know the place where we can have a talk.
The zoo is an ideal research centre where scientists can experiment on animals to find out the causes of some disease and develop effective cures.
where的先行词可以是有地点含义的抽象名词。如:
He has reached a point where a change is needed.
why在定语从句中用作原因状语,其先行词只有reason。如:
That is the reason why he set up his own business.
The company refused to disclose the reason why he left.
有时候why可以省去。如:
The reason he came here is obvious.
有时候why可以用that替代。如:
The reason that he failed was lack of patience.
关系副词 = 介词 + which
where = in/at which; when = in/at which; why = for which
定语从句分为限制性定语从句和非限制性定语从句。考生注意,限制性定语从句与先行词关系密切,对它有限制性作用,因此不可缺少,如果省去,会使主句的意思不完整、不明确。限制性定语从句前面一般不用逗号。如:
The man who was driving the car was drunk.
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2016-02-26
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