关于 英语中could的用法 谢谢了

Question

You could get =you would be able to get
You could speak=you were able to speak
请问这两句有什么区别？多谢！

Answer 1

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。

如果你满意我的答案，敬请点击 “选为满意回答” ，谢谢！

Answer 2

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

Answer 3

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 club in those days.那时我能跑得更快。那时好得不能再好了。在当时，只有男人可以去俱乐部
2. Used with hypothetical or conditional force:用来表推测或条件：
用法与例句：

If we could help, we would.如果我们能帮上忙，我们会帮的
3. Used to indicate tentativeness or politeness:用于表示试探性或礼貌：
用法与例句：
I could be wrong. Could you come over here?我也许错了。你能到这边来吗?