Question

You ______ hand in your homework today.You can hand in it tomorrow.

need to
needn't to
needn't
do need to

Answer 1

选needn't

此外，答案还可以是don't need to

Answer 2

needn't

Answer 3

needn't

Answer 4

选择needn't . need有两种词性：1)实意动词，其否定形式应为don't need 2)情态动词，其否定形式应为needn't. 情态动词后接动词原形，即不能有to.

Answer 5

答案是needn't to-----没必要，不必；
needn't-----不可能，不能够。