Question

定于从句还是同位语从句？ the reason why he missed the train was that he got up too late.

这句话呢：the reason he has made such great progess is that he never wasted time.(同位语that是否可以省略？），
they have no idea at all where he has gone.
the reason he has made such great progess,这里he has made such great progess如果是reason的定语从句，但是如果是that/why引导被省略了，在句中作什么成分？
如果he has made such great progess是reason的同位语，that肯定不能省略。

Answer 1

that从句为表语从句, that不可省。The reason is that he never wated time.
the reason后面的he has mad such great progress从句为定语从句,其间也可加上the reason why，也可省略why，此从句用来修饰the reason.
希望对你有帮助

Answer 2

同位语从句，that不可省略 ,另外that我感觉应该是why

追问

如果是why 就应该理解为定语从句哦

追答

既是同位语，又是表语从句。why引导的is后面的表语

追问

怎么可能是同位语，又是表语呢？

追答

它是对reason的同位语，对它的解释，是同位语，why是is后的表语

Answer 3

the reason he has made such great progess is that he never wasted time.(同位语that是否可以省略？
我怎么觉得中间应该是why 而不是that呀？why 不能够省略。

追问

但是书上就直接是没有连接词，这个怎么理解呢？

追答

明白了，书上就是省略了that。而且，不见得一定用 why，that 也可以的，而且可以省略。共勉。

Answer 4

可以

追问

是同位语还是定语从句呢

追答

用 that 的话 就是定语从句 可以省略

追问

那why 呢?

追答

同位语