情态动词的祈使句把You must keep quiet in the reading room.You cannot swim in the river.My brother is able to ski.改为祈使句再+个：You must not read in the sun.

情态动词的祈使句把You must keep quiet in the reading room.You cannot swim in the river.My brother is able to ski.改为祈使句再+个：You must not read in the sun. if引导的情态动词 祈使句 主将从句各一个 动词不可修饰动词,那情态动词可修饰动词吗,例：you must go now! 情态动词一般疑问句否定回答的情态动词和疑问词不同例如must i...no you do not have to You must know why i am calling you.此句中有情态动词must,怎么又能用动词的ing形式呢同上 must是情态动词吗? 关于一情态动词是不是以need 为情态动词的英语句,必须肯定用must,否定用 neednt如,Nees I stay here any longer回答中YES,you must,（必须用must吗,) 情态动词的反义疑问句.例如：can、must need 等等 情态动词can、must、may、should、need的用法 Should,must.shall.等情态动词的意义和用法 情态动词的用法,can,may,must,need,could,dared 情态动词must的用法,举个例子! 关于情态动词must,can,may的用法 情态动词用法can/have to/must的用法 情态动词have to与must的用法区别 dare和情态动词must各是是怎么用的? 英语语法问题,关于情态动词,-Must...-Yes,you must.No,you needn't.就像上面这类的,求更多的,关于情态动词的问和答的方法的. 把you must get up early every day改为祈使句