作业帮can't和couldn't区别?
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/07 08:14:48
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can't和couldn't区别?
can't和couldn't
区别?
can't和couldn't区别?
第一个区别 时态 can 是现在是.could 是过去式
第一个区别 could 比can 多一个意思就是情态动词 ,大概意思就是 couldnot 有个 委婉,这类的意思 cannot 没有
can't是不能could't是不愿
can't比could't语气要强
通常前者现在时，后者过去时，口语中前者语气没后者委婉，后者表示礼貌用法
首先是时态：前者表一般现在，后者表一般过去。其次是语气：前者直接，无商量余地，后者较委婉。且后者是前者的虚拟语气表达法。
can't和couldn't区别?
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can't与couldn't的区别
may not/can't/couldn't/needn't/mustn't举例区别意思和用法
didn't 和couldn't的区别,
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can’t / couldn’t have
表示否定推测只能用can't 和 couldn't
表示否定推测只能用can't 和 couldn't
We couldn't watch until our homework was finished.为什么用couldn't 换成cann't 行不行 could 和 can 有什么区别?
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couldn t和
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