Question

这句话有语法错误吗？1.what do you mean that you said? 2.what do you mean what you said?

3.what do you mean by what you said? 4.what do you mean by saying? 以上分别错在哪里？

Answer 1

3.what do you mean by what you said? 是对的。

what do you mean 是一个完整的句子，不能直接接上一个名词性从句，但是可以由by引导一个状语。

Answer 2

what do you mean by sth 或者 名词性从句
比如说 what do you mean by beauty?
what do you mean by The tax systerm isn't fair?你说的税收不公正是什么意思
句子3 语法正确，但语义累赘
句子4应改为 what do you mean by saying so/that?