为什么用what不用that.i found it quite different from (what) i thought before为什么用what不用that.i found it quite different from (what) i thought before

I don't know what I can do for you 为什么用what不用that That is what i am here for为什么不用why 为什么用what不用that.i found it quite different from (what) i thought before为什么用what不用that.i found it quite different from (what) i thought before They always let me do what i think i should.这里为什么不用that而用what? You can have this for what I paid for it.为什么要用what 不用 that which something that you must pay fou what you buy. I just wonder ______ that makes him so excited.为什么不用what he does That's exactly what I what.为什么用exactly啊? I can explained everything __I can to you.为什么用I can explained everything __I can to you.为什么用that.不用what guess what I bout fou you 求翻译 I spent what might be a very long time persuading my child to stay.为什么用what而不用which或that? 英语关系词this book is not so interesting as that I read yesterday.这里为什么用that 不用what?名词性从句read不是少成分吗? 这儿为什么用made up my mind不用mind,make I decided to visit a fortune-teller.that's what i made up my mind to do China is no longer what it used to be 为什么用what不用that? Jim's father got very angry with what he had done为什么用what不用that Quality is what counts most.句中为什么用what不用that来引导呢, Sally found what they said was right.为什么用what 而不用that At least that`s what I heard him say one night.这里that`s的作用是什么,为什么加`s我觉得用不用that`s what 都无所谓啊..