为什么will,shall.can.may没有过去分词和现在分词而有过去式

...,do you?...,can ...will you?...shall it? ...,do you?...,can ...will you?...shall it? Man die without water.A.will B.can C.need D.shall为什么选A 为什么will,shall.can.may没有过去分词和现在分词而有过去式 为什么can will shall must没有过去分词?must 过去式都没有. will,would,shall,should,can,could,.什么时候加be,什么时候不加..那...it will be done,和 i will be back,,这是动词,,,那为什么加, Will would; shall should ;can could区别和用法 I __________ not do my homework, said the boy.You __________, said his father.A.will,will B.shall,shall C.shall,will D.will,shall为什么 I will let you see the patient in an hour if you _____ wait here. A shall B will C can D should选哪个,为什么 shall,must,will,would,can,could,委婉程度怎么样,是不是用can最委婉,那shall呢 Let’s play soccer, ________?A. will you B. won’t you C. shall we D. can you应该选哪个? 其余的为什么不对. --what can I do for you?-- if you__see Mr Black,give him regards.A should B would C shall D will为什么选A? 58.My little sister ____ six next month.A.will be B.shall be C.can be D.is going to 为什么选A,不选D would I wish you _________ go with me tomorrow.A. will B. would C.shall D.can 选哪个,为什么?谢谢. The law____come into effect on October 1stA.should B.will C.shall D.can答案应该选C为什么?请说明原因, 关于shall 提问一个很简单英语选择题Shall we go hiking this Saturday? ——sorry,l＿＿, l will have to take a piano lessonA.may not B.can‘t为什么选B,不选A? let us watch TV,will you 为什么不用shall we Did he say he will not go?Yes ,but I say he shall 为什么用shall