关于 英语中could的用法 谢谢了

此两句涉及到could的两个基本用法,解释如下：

1. could可以表示“（过去）能/会...”,表示过去所具有的能力,此时could do sth = was/were able to do sth
所以：You could speak... = You were able to speak...
2. could还可以表示对过去动作的推测（有点类似于虚拟语气）,可以理解成“（本）可以/能...”,此时可以变换成：could do sth = would be able to do sth
所以：You could get... = You would be able to get...

could还有其他用法.到底是哪一种用法,必须根据上下文和句意才能准确判断.




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could用法：
1. Used to indicate ability, possibility, or permission in the past:用来表示过去的能力、可能性或允许：
用法与例句：
I could run faster then. It could be no better at that time. Only men could go to the ...

没啥区别，因为can﹦be able to do sth
例如I can swim=I am able to swim