have it do和have it done有什么区别?

have it do和have it done有什么区别? I thought I could have done it 和 I thought I could do 有什么区别? have sth done和have sth to do和have sth do有什么区别? can have done和 could have done有什么区别? must have done和have done有什么区别 have sth done 和have sth to be done 有什么区别呢?Do you have any le have done和have do区别 could have done 和 can have done 有什么区别?还有would have done claim to have done sth 是声称做过某事 可是to do 和 to have done 有什么区别? make done和have done有什么区别么? have done和 had done有什么区别? HAVING BEEN DONE和HAVE BEEN DONE有什么区别?