lily could not have accepted the invitation-----?为什么用has she 不是could she

lily could not have accepted the invitation-----?为什么用has she 不是could she could not have done 谁知道could not have must not have been;could not have Could not help but have to you did not call lily last night,did you?---------------.because l did not have hertelephone number can not have visited could have visited must have visited should not have visitedcan not have visitedcould have visitedmust have visited should not have visited In fact,you did not know they could have been I have ( ) story books,Do you have( Lily and Ma Li have not( )toy cars.any some 选择填空急 could not could not If it _ for the rain,we _ the picnic yesterday.A were not; could have hadB were not; could haveC had not been; could have had 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 1should not have done 2 could not have done 3 would not have done 有什么区别 英语翻译All the clothes have been washed by lily.All the ciothes have not been washed by lily.回答改过的反义疑问句！翻译回答！ could never have done和could not do有什么区别 情态动词加上完成时的意思?could not have done must not have done should not have done would not have done 以及它们的用法?