can,may,should,have to,need有什么差别?

can have ,will have ,may have,should have的差别 can may must should have to need 的区别 can,may,should,have to,need有什么差别? 选用can(not),must(not),should(not),have to,may选用can(not),must(not),should(not),have to,may,need(not),would,并用其适当形式填空 can,could,have to,may,might,must,should,语气强弱由强到弱怎么排列? we-------study hard for our parents and ourselves A can B have C may D should didn't see him yesterday-oh,but youA;ought toB;should have C;can't haveD;may have can ,may ,must ,should的意思 she is two hours late.what ( )to her?A should have happened B must have happened C may have happened D can have happened You _______ be tired; you have only just begun to workA.can notB.should notC.mustn'tD.may not What___I do if I want go be good at English?A.may B.should C.can D.have Parents _____ take their children away from the blue flag area A.can B.should C.may D.have to What can have happened to her29.She's already an hour late,What _____to her A can have happened B may happen C should have happened D may have happened 为什么选A,B＼D有什么不对吗 选词填空：may might may have might have may have had选词填空：may might may have might have may have had can not I can’t find Mr Wang anywhere in the office building.Where____he have gone?（b）A.may B.can C.must D.Should 选择适当的情态动词填空 can,may,must,shall,would,should,can't,mustn't,needn't,have to____you please give me some water? he was caught in the rain last night.that___A.can bring aboutB.ought to bring aboutC.should have brought aboutD.may have brought about he was caught in the rain last night.that___（选下一句）A.can bring aboutB.ought to bring aboutC.should have brought aboutD.may have brought about