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can和could的区别及用法(Can与Could的用法)

can和could的区别及用法(Can与Could的用法)Can和could也可以用来表示感知动词(看、听、感觉、味道、嗅觉等)的连续时态,以及理解、记住等动词。这些词分别是(see hear feel taste smell like understand remember)等。表达感知动词的能力 Could 是Can的过去式动词could主要是can的过去式。但它不仅仅是can的过去式:它还有其他can不具备的功能,例如,在第一件句中,参见英语条件从句的使用例句

Can vs Could: How to Use the

can和could的区别及用法(Can与Could的用法)(1)

我们来讨论一下情态动词can和could的用法。我们都知道能用英语表达做某事的能力或可能性有多重要,但英语语法可能很棘手。

而an和could是情态助动词,用来表达一种能力、许可、请求、提供或机会。在本文中,我们将探讨can和could之间的区别,以及如何使用它们。

Can vs. Could: 使用规则

Could 是Can的过去式

动词could主要是can的过去式。但它不仅仅是can的过去式:它还有其他can不具备的功能,例如,在第一件句中,参见英语条件从句的使用

例句

  • She can speak Italian very well.
  • I could swim but I couldn’t ride a bike when I was nine years old.
  • You can play with Amy after you do your homework.
  • Could I have some tea?
  • Can I carry your bags?
  • We could go somewhere tonight.
  • That can’t be true.
  • You could get there in time if you hurried up.

表达感知动词的能力

Can和could也可以用来表示感知动词(看、听、感觉、味道、嗅觉等)的连续时态,以及理解、记住等动词。这些词分别是(see hear feel taste smell like understand remember)等。

例句

  • Can you see the light over there?
  • When I entered the room I could hear something scratching.
  • Harry put the keys in his pocket but now he can’t find them.
  • We couldn’t understand what the stranger was saying.

表面一般的能力

作为动词can的过去式,could在过去式和间接引语中用来表达一般能力。

例句:

  • He said he could get that ticket for me.
  • When I was younger I could work out for two hours without stopping.

命令或要求某事

在请求、命令和句子中,使用could比can更礼貌。

例句:

  • Do you think you could help me with this case?
  • Can I use your phone?
  • Could you do me a favour?
  • Do the urgent task first and then you can check the rest.

请求允许

当然,当我们请求许可时,最好使用动词can,因为could不能用来表示同意或拒绝同意

例句:

  • Can I trust you? – Of course you can.
  • You can stay here if you want to.
  • Can I have another cup of coffee? – No I’m afraid you can’t.

You drank too much coffee.

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