用must造三个肯定句，否定句，疑问句和回答。

Question

我们上英语课要用的，急~~~~~~~~~

Answer 1

We must study hard
must you study hard?
yes,you must/no,you needn't

Answer 2

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.

Answer 3

we must study hard
we mustn't sleep when we have class
must we do it now?
no,we needn't
yes, we must

Answer 4

i'm
a
student
you
are
a
teacher
tom
is
a
good
boy

否定句
i'm
not
a
student
you
are
not
a
teacher
tom
isn't
a
good
boy
疑问句：
are
you
a
student
?
are
you
a
teacher
?
is
tom
a
good
boy
?

你的采纳
我的动力
希望我能继续帮助你