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情态动词有空闲性吗

来源:www.hjjjm.com 2025-01-13

朗文六版,can可以表示“命令”,If you won't keep quite,you can get out.请问可以用could表示过去的命令吗?If you would notkeep quite,you could get out.

can 是情态动词中意思最广泛、使用方法最多的一个词。

其实,本句的 can 仍然是“许可”范畴,只不过带有“强制”意味。can 表示的许可有多种多样,比如:请求许可、给予许可、陈述许可等,大家可以把这种使用方法归结为“强制许可”。我发现,有的词典和语法书把 can 说成“义务、命令、禁止”等使用方法。结果是,人为扩大了 can 的表意范围,叫人眼花缭乱,没办法记忆。其实,大家可以把“义务、命令、禁止”这类意思,统统划到 can 的许可使用方法范畴,而“强制许可”只不过其中的一个小类。

对于网友的问题,我觉得,表示“强制许可”时,can 不可以用过去式或虚拟语气,间接引语除外。

 

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