---Mum,may I watch TV after supper? ---No,you______.You must finish your homework first. A.needn't B.mustn't C.shouldn't D.don't have to How to choose and why? Could you make a sentence with"don't have to"? Thanks.
don't have to = needn't 是根据句子的意思选 B You don't have to wash the dish after supper.
第2个回答 2006-12-03
B may 提出的问题,表示许可,征求对方意见, 肯定回答:yes ,you may /can 否定回答;no,you mustn't 另外,need表示必须,have to 表示义务责任,有不得不做的含义 you don't have to pay for the meal.i will treat you.