Part 1: Positive and negative
We use can to talk about things we know how to do.
|Positive (+)||I / You / He / She / It/ We / Your / They||can||swim.|
I can swim well. NOT I can to swim well.
She can swim well. NOT She cans swim well.
He can’t swim well. NOT He not can swim well.
I cannot swim. → ‘I can’t swim.’
In all persons (I / you / he / she / it / we / they) can / can’t and the verb don’t change.
Part 2: Questions
|Yes/ No questions||Positive Answer||Negative answer|
|Can you swim?||Yes, you can.||No, you can’t.|
|Can she swim?||Yes, she can.||No, she can’t|
|Can they swim?||Yes, they can.||No, they can’t.|
Can you swim? NOT You can swim?
Yes, I can. NOT Yes, I swim.
No, I can’t. NOT No, I not swim.
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Learn or review for free GRAMMAR about the Past Simple: Positive, at A2 Basic level of English, with our interactive online exercises.