用must not do 造个句子.用couldn't have done造个句子.

用must not do 造个句子.用couldn't have done造个句子. 用must have to do need to do个造两个句子拜托了各位 谢谢 must not do Must you do not I must do the dishes用HE改写句子 用advise sb to do sth和advise sb not to do sth.个写5个句子. 写出School rules 用must 和must not 来写句子各5句快 ---I do not know why Tom was absent from yesterday meeting.---He must been sick ,( )A.is not he B.was not he C.did not he D.must not he选第二个,为什么 I not have a pen 为什么这个句子错了,好象是在not前面+个do吧,在句子中什么时候用do,我很迷惑. must提问时用haven not或do not need回答可以么 do not talk too much若用must改写这句话,为什么是You must not talk too much..也就是说 ,为什么要去掉do?一句话中可以出现2个动词把,比如若是Be quiet.用must改写的话,是：You must be quiet.中间的be没有去掉啊 we must buy things we ( )A.need not B.do not need C.have not something must do,something must not do must 加to They who can not do as they would,must do as they can.分析句子结构 把下面2个句子用in order to 连接合并一个句子.We must spend more time studying.We can do better in the exam. What must Nina not do 用Must be/do或Can't be/do改句子. will you 句型回答方式在没有will not的情况下,用can not、need not、do not还是must not?