问题补充：
I must do my homework改为一般疑问句,肯否回答,便否定句 You may go home now改为一般疑问句,肯否回答You may go home now还要变为否定句哦
答案：
Must you do your homework?Yes,I must .No,I needn .(I don have to).
I needn do my homework.
May I go home now?Yes,you may.No,you mustn .(can )
You may not go home now.
