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关注：1
2013-05-23 12:21
求翻译：3. have to 的否定形式和疑问式一般要借用助动词do的适当形式构成， have to 的否定式是 don’t have to ; has to 的否定式是 doesn’t have to; had to 的否定式是didn’t have to.是什么意思？ 待解决
 悬赏分：1
- 离问题结束还有
3. have to 的否定形式和疑问式一般要借用助动词do的适当形式构成， have to 的否定式是 don’t have to ; has to 的否定式是 doesn’t have to; had to 的否定式是didn’t have to.
问题补充： |
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2013-05-23 12:21:38
3. Negative form interrogative have to "generally borrow the appropriate form of the auxiliary verb do constitute have to negation of style do not have to; has to negation of style does not have to; had to the negative type didn't have to.
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2013-05-23 12:23:18
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2013-05-23 12:24:58
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2013-05-23 12:26:38
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2013-05-23 12:28:18
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