i have to 的用法

2个回答

  • 首先记住:have to do sth 是实意动词或行为动词.

    I have to do the housework every day.I had to...

    I don't have to do the housework every day.I didn't have to...

    Do you have to do the housework every day.Did you have to...

    Yes,I do.Yes,I did.

    No.I don't.No,I didn't.

    另一种情形是作为 ---Must...的否定应答之一:

    ---Must I hand in my homework right now?

    --- Yes,you must.

    ---No,you needn't = you don't have to.You may hand it in this afternoon.