The students needn't hand in their homework at once.改写句子,句意不变
问题描述：
The students needn't hand in their homework at once.改写句子,句意不变
答
The students have no necessary to hand in their homework at once.
答
There's no need for students to hand in their homework at once
答
The students don't need to hand in their homework at once
这里need既可以做情态（如can ,dare）动词,又可以做实义动词
此处考的是他们的转换
答
The students do not need hand in there homework immediately.