Can and can’t are important words in English. We use them to talk about abilities, permissions, and possibilities. They are easy because the verb does not change for different people. Try this exercise:
Structure
We use:
- Subject + can + verb
- I can speak English.
- She can swim.
- Subject + can’t / cannot + verb
- I cannot drive. (more formal)
- He can’t dance. (neutral / informal)
In questions, we put can at the beginning:
- Can you speak English?
- Can we sit here?
We do not say “can to” and we do not add -s or -ing to the verb.
For short answers, we use only can or can’t, without the main verb.
- Can you speak English? Yes, I can.
- Can we sit here? No, you can’t.
Can and Can’t Infographic

Uses of Can and Can’t
Abilities (skills)
We use can to talk about things people know how to do.
- I can cook.
- She can’t play the guitar.
- Can they swim well?
Permission (what is permitted)
We also use can to say what people are allowed/permitted to do.
- You can use your phone now.
- You can’t eat in the classroom.
- Can I open the window?
Possibility (what is possible)
We use can to talk about options or things that are possible.
- You can take the bus or walk.
- We can’t order beer here.
- Can we park in front of the school?
Can and Can’t exercises
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Too easy for you? Check the other modals:
