是must to do还是must doing 还是must do?

是must to do还是must doing 还是must do? must doing还是must to do? 是must be to do还是must be doing must 的用法是must sb do 还是must sb to do must 后面是加to do sth.还是do sth. must do sth 还是 must to do sth Do you must try____work tomorrow?是to finish 还是finishing 是must doing sth 还是to do sth? something must do,something must not do must 加to must not 后面加do doing 还是to do? must 后面是加do sth.还是 to do sth.有没有人呐、 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 Attentions must be paid to do sth还是doing sth when do they must go to home和when are they must go to home?有什么不同?还是有个是错的?是不是must是助动词，do也是助动词，一句中不能出现两个助动词？这样对吗？ 请问must to do sth?句型对吗? have to do和must的区别 what must you do to be safe? 能用must have to do sth 吗?