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When we want to describe the ability to do something in the present we often use can. When we want to describe the ability to do something in the past we use could, the past form of can.
Sentence (present) |
Explanation |
Sentence (past) | Explanation | |
+ |
I can swim |
When we have the ability in the present |
I could swim |
When we have the ability in the past |
- |
I can't swim |
When we do not have the ability in the present |
I couldn't swim | When we do not have the ability in the past |
? |
Can you swim?
|
When we want to know about someone/something else's ability in the present |
Could you swim when you were younger?
|
When we want to know about someone/something else's ability in the past |
An alternative to both can and could is be able to. The form be able to can be used in both the present and the past and functions in exactly the same way as can and could
Present form |
Past form |
|
+ |
He is able to play the piano |
Aged three, he was able to ride a bike |
- |
She isn't able to sing well |
Aged two, I wasn't able to use a computer |
? |
Is he able to speak German? |
Were you able to get a job? |
Although can/could and be able to in the present and past are the same in many situations, it is important to remember that can/could can be used for general abilities but be able to can be used for specific abilities or specific moments when abilities are used.
When we want to describe the ability to do, or not do, something that is difficult for us we can use manage to in both the present and the past:
Sentence (present) |
Explanation |
Sentence (past) | Explanation | |
+ |
I manage to finish my work on time |
It is difficult for me but I can finish my work without doing extra work later |
We managed to get tickets for the concert |
We succeeded in doing something that is difficult in the past |
- |
I don't manage to speak to my Mum every day |
It is not possible for me to have the ability to call my Mum every day |
I didn't manage to pass the exam | It was difficult so I did not have the ability to do something |
? |
Do you manage to exercise regularly?
|
When we want to know if someone has the ability to do something that is difficult |
Did you manage to find the car keys?
|
When we want to know if someone had the ability to do something in the past |
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