need,may,must引导的问句(作情态动词),肯定和否定分别是什么?
问题描述:
need,may,must引导的问句(作情态动词),肯定和否定分别是什么?
答
must-Yes,you should./No,you needn't.need-Yes,you should/may/can/need./No.you needn't/musn't.may-Yes,you may/can./No,you musn't/can't.