could

verb

1. simple past tense of can

- Before I was blind, I could see very well.

2. conditional of can

3. Used as a past subjunctive (contrary to fact).

- I think he could do it if he really wanted to.

- I wish I could fly!

4. Used to politely ask for permission to do something.

- Could I borrow your coat?

5. Used to politely ask for someone else to do something.

- Could you proofread this email?

6. Used to show the possibility that something might happen.

- We could rearrange the time if you like.

7. Used to suggest something.

- You could try adding more salt to the soup.