This is the reason ——I came hereA.that B.why 为什么不用that

问题描述:

This is the reason ——I came here
A.that B.why 为什么不用that

要是that的话,表明从句是不完整的,但从句中came为不及物动词无需带宾语,因此从句是完整的,that显然错误。。why在从句中作原因状语,即我曾经到这来的原因。。(*^__^*)

后面的从句I came here是一个完整的句子,不缺主语宾语,因此空格处是关系副词why,不是关系代词that

这句话可以拆分为:This is the reason.I came here for this reason.
合并起来:This the reason why I came here.
如果用that的话,是用来直接和reason同位语.
比如 This is the reason that I give to you.

the reason why……表示 ……的原因 固定搭配