Question

what=thing that?

what=thing that?

Answer 1

what引导名词性从句时可以理解为the thing that

追答

这个thing 可根据句意换上不同的名词。

如: what you said = the words that you said 你所说的话

Answer 2

what引导名词性从句的五种用法
一、用法归纳
1. 表示“……的东西或事情”：
They’ve done what they can to help her. 他们已经尽力帮助了她。
He saves what he earns. 他赚多少，积蓄多少。
2. 表示“……的人或的样子”：
He is no longer what he was. 他已经不是以前的那个样子。
It is difficult for us to imagine what life was like for slaves in the ancient world.
对我们来说很难想象在古代世界奴隶的生活是什么样子的
3. 表示“……的数量或数目”：
Our income is now double what it was ten years ago. 我们现在的收入是10年前的两倍。
The number of the students in our school is ten times what it was before liberation. 现在我校学生的数量是解放前的10倍。
4. 表示“……的时间”：
After what seemed like hours he came out with a bitter smile. 似乎过了几个小时他才苦笑着出来。
The young girl was too frightened to speak, standing there for what seemed like hours.
小女孩吓得不敢说话，在那儿站了几个小时。
5. 表示“……的地方”：
This is what they call Salt Lake City. 这就是他们称为盐湖城的地方。
In 1492, Columbus reached what is now called America. 1492年哥伦布到达了现在所称的美洲大陆。
二、用法说明
(1) 这样用的what相当于“先行词+关系代词”，所以其前不能有先行词：
你喜欢什么就拿什么吧。
You can have what you like. / You can have everything (that) you like.