问题描述：
have to 做谓语的一般疑问句,肯定回答和否定回答以下这两种形式是否都正确?请哪位大虾告知?
例如：Do you have to take care of your father at home?
肯定回答：Yes,I do..或者Yes,I must.
否定回答：No,I don't.或者No,I needn't.
例如：Do you have to take care of your father at home?
肯定回答：Yes,I do..或者Yes,I must.
否定回答：No,I don't.或者No,I needn't.
问题解答：
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