英语问题

Question

---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.

Answer 1

B.mustn't 。此题考查情态动词的提问及其肯否定形式的回答。具体如下：
1。用may,can提问，肯定用can回答，否定用can't或mustn't回答，且后者不赞同的语气更强，即“绝对不可以。”
2。用must提问，肯定用must回答，否定用needn't或don't have to回答，意思是“不一定非得要...才行”。

例句：You don't have to finish the homework.家庭作业你可做可不做。

望满意。

Answer 2

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.

Answer 3

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.