could have done语气婉转 且是can have done得过去式
can have done和 could have done有什么区别?
1个回答
相关问题
-
should have done ;could have done; might have done 有什么区别
-
could't have done和can't have done的区别
-
can't have done与could't have done的区别
-
could have done 和 might have done 的区别?
-
could/should/must/.加have done和have been done区别
-
should have done 和have done有什么区别
-
情态动词can't have done 和couldn't have done 有什么区别吗
-
have done和have been done有什么区别呢
-
have done和 had done有什么区别?
-
couldn't have done和mightn't have done有什么区别