People can say everything they like正确应该是People can say what they like 请从语法的角度帮忙解释一下为什么一定要用WHAT?everything （that) they like
问题描述：
People can say everything they like
正确应该是
People can say what they like
请从语法的角度帮忙解释一下为什么一定要用WHAT?everything （that) they like
答
如果要用that,就必须用all that.all that=what.
这个是个宾语从句.人们可以说他们喜欢什么,喜欢是动词,后面跟宾语.所以用what.
或者是all that.