助动词can ,may,must的基本用法与could,might ,woulid形式的区别

can、could、may 、might、must、ought 的区别和用法 can,might,may,could,must的用法 助动词：can ,may .must的基本用法! shall should may might can could must虚拟语气的用法与区别比较 MAY CAN MUST COULD MIGHT表示推测时的用法 情态动词can could might may 的用法和区别 MAY CAN MIGHT COULD的用法 must ,might ,could ,can't的用法? 急需知道”情态动词+have”用法即”may/might/must/can/could等+have"的意义及区别 在表推测时must may could might的区别和can not、could not、may not、might 情态动词的用法can/could/may/might/will/would/shall/should/must/can' might,may,can,must的区别