must的过去式怎么写?

如题.

2023-07-24 提问者:31415926xwt

教师解答

尚未回答。

学生讨论

31415926xwt:

must有过去式吗？

2023-07-26

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zyh012191:

had to

2023-09-14

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Diana:

had to

2023-09-24

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