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词组 mustn't
释义 mustn't (be) • can't (be)

- I know he looks older, but he can't be more than 30. (Not *mustn't be* *mustn't to be*) (can't (be) is the negative of must (be) to express certainty or deduction. Compare: He must be more than 30.)
- In future, he mustn't be so careless. (mustn't (be) expresses negative obligation)
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更新时间:2024/10/30 14:18:21