can must may shall等一类词的用法

情态助动词用法?can,shall,need,must,will,may,have to的用法 情态动词的用法can/could/may/might/will/would/shall/should/must/can' 情态动词的用法：must,can(could),may(might),ought to need,dare shall( shall should may might can could must虚拟语气的用法与区别比较 哪位神可以告诉我must/can/may/need/should/musn`t/can`t/shall的用法,大脑混乱i can,might,may,could,must的用法 情态动词：can may must的用法 助动词：can ,may .must的基本用法! can,must,may的用法是 must,can,may ,should,would,need和shall的区别 may;must;shall;的过去式 may,can,must,need,shall辨析