must to do和 must to be有什么区别,后面应该加什么?must在这里面做什么?

have to do和must的区别 是must to do还是must doing 还是must do? something must do,something must not do must 加to must doing还是must to do? have to do和must to do可互换吗? must to do和 must to be有什么区别,后面应该加什么?must在这里面做什么? must do sth 还是 must to do sth must to do sth 和 have to do sth和need to 的用法急 是must be to do还是must be doing must 的用法是must sb do 还是must sb to do 请问must to do sth?句型对吗? what must you do to be safe? 能用must have to do sth 吗? have to 和must 的区别是什么记住,一定要直观,比如是 I must还是have to do my homework?must是被动还是have to 是被动 ..this is the habit which you must to do must 后为什么加to do呢,must不是助动词吗? You must do exactly what I tell you to do must 后面是加to do sth.还是do sth. must not 后面加do doing 还是to do?