May I watch TV now?(根据答语填空) No,________ _________.you must finish your homework frist.

问题描述:

May I watch TV now?(根据答语填空) No,________ _________.you must finish your homework frist.

you can't (你不能)为什么用can't?may 和can 是一样的,只不过比can 委婉,而且只有填can't 意思正确。must not 不准 needn't不必。