I have done sth请问这里的have是什么词,助动词吗

I have done sth请问这里的have是什么词,助动词吗 请问i should have say thank you 这里面是should have done 的用法吗用say could have done sth 和must have done sth 的区别是什么 have sth done sth? have sth done 的过去完成时? have sth done的 反意疑问句疑问词是什么啊 have sth.to do .和have sth.done的区别是什么? have sth.done 汉语意思是什么? have sth.done和get sth.done的区别? sth.done 和 have sth.done 的意思和区别! have sth.done 和 get sth.done 有什麼区别吗 have sth done意思