could not have done
could not have done
could not have done是什么意思?
1should not have done 2 could not have done 3 would not have
请问could not have done/might not have done可用于虚拟语气中吗
May not have done 是表示可能不还是不可能 那Could not have done呢
could never have done
could have done
could have done 表示过去有必要做某事却未做 could not have done没有虚拟语气的用法,只
could have done和should have done
could have been done ,could have
could never have done和could not do有什么区别
Could have done would have done should have done