can have ,will have ,may have,should have的差别
can have ,will have ,may have,should have的差别
can,may,should,have to,need有什么差别?
can may must should have to need 的区别
请问情态动词should shall will would can could must need may have t
can have gone和may have gone的区别
选用can(not),must(not),should(not),have to,may
should have
用may/might have; must have; should/ought to have; could have
have,should的近义词
should/must/would/could/might/may have done的问题!
can ,may ,must ,have to ,shall ,will ,need的英语语法?表示本意和猜测.
情态助动词用法?can,shall,need,must,will,may,have to的用法