can,may,should,have to,need有什么差别?

can,may,should,have to,need有什么差别? can may must should have to need 的区别 can have ,will have ,may have,should have的差别 can,must,have to,should,may,could,might有语态上有什么区别,怎么区别 1.can 2.could 3.may 4.might 5.should 6.need 7.must 8.have to must,can,should,need有什么区别 选用can(not),must(not),should(not),have to,may should,must,have to,need,can的用法区别 请问情态动词should shall will would can could must need may have t 情态动词大聚会（should,need,must,will,can,could,hav to,may,would) 求用need,might,may,must,should,can,could,would,used to,is used should can may would could 有什么区别