先行词是reason,但引导定语从句的词不用why的情况.

先行词是reason,但引导定语从句的词不用why的情况.

题目
先行词是reason,但引导定语从句的词不用why的情况.
答案
(1)在reason作先行词的定语从句中,若从句表原因,一般用why引导定语从句,why可以用for which替换.why还可省去.
The reason why (for which) he has resigned is poor health.他辞职的理由是健康状况不佳.
(2)当reason用作定语从句的宾语时,引导词用that/which,而且that/which可省去.
The reason (that/which) he gave for being late was that they were held up in a traffic jam
他给出的迟到原因是由于他们被交通阻塞给耽误了.
(3)注意句型This/That's why… This/That's the reason why…
That's why he did it.(不用that代替why)这就是他为什么做这事的原因.
That's the reason why he did it.(口语中可用that代替why)
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