| 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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