用must造三个肯定句,否定句,疑问句和回答.
问题描述：
用must造三个肯定句,否定句,疑问句和回答.
答
1.it must be Tom who broke the window.
2.it's not a must that we have to finish all this today.
3.must you always question everything i say?
4.we must finish this work by today.
答
we must study hard
we mustn't sleep when we have class
must we do it now?
no,we needn't
yes, we must
答
We must study hard
must you study hard?
yes,you must/no,you needn't