Can/ can't; could/couldn't

Front

What does 'can' express in a sentence?

Back

Ability or possibility.

Front

Provide an example of 'can't' in a sentence.

Back

I can't go to the party tonight.

Front

How do you form a negative sentence with 'can'?

Back

Add 'not' to 'can' to form 'can't'.

Front

Provide an example of 'couldn't' in a sentence.

Back

I couldn't finish my homework yesterday.

Front

In what context would you use 'could'?

Back

To express ability or possibility in the past.

Front

What is the difference between 'can' and 'could'?

Back

'Can' is used for present ability, while 'could' is used for past ability.

Front

What does 'can't' indicate in a sentence?

Back

It indicates inability or impossibility.

Front

How is 'could' used in making requests?

Back

'Could' is used to make polite requests.

Front

Provide an example of 'can' in a sentence.

Back

I can swim very well.

Front

What is the negative form of 'can'?

Back

Can't or cannot.