When we talk about our abilities in the present we use can.
I can means I am capable of doing something.
For example, I can play volleyball, I know how to play, and I am capable of doing it.
I can do yoga too. I know the yoga poses and I have the ability of doing yoga.
When we talk about our skills or general abilities we use the modal verb can with a main verb.
He can play football. - can:modal verb play:main verb
1.We use can to talk about ability in the present or future.
I can do it. means I have the ability, skills to do something in the present or future.
Let’s see some examples:
2.We also use can when we have the ability to do something and also the conditions allow you to do it. (We have time, money, etc., to do something and / or we want to do it.)
3.We use can’t when we have the ability to do something but the conditions do not allow you to do it. (We don’t have time, money, etc., to do something, we have another plan, or, we don’t want to do it.)
Can and could are modal auxiliary verbs, they do not change with different possessive pronouns. (For example, we don’t add 's' in the third person singular. (
He cans run)
We use can and could with another verb (main verb) in the sentence, we use the main verb in bare infinitive form (infinitive without to).
We add can and bare infinitive after the subject pronouns to form positive sentences.
Subject + can + bare infinitive
I can play chess.
We do not say he cans or she cans, we say he can or she can.
She can speak 7 languages.
We add not after can to make the sentences negative.
I can’t do it. means I don’t have the ability to do it, I don’t know how to do it.
Subject + cannot + bare infinitive
He cannot drive a car.
The short form of cannot is can't. We usually use the short form in negative sentences.
We use can before the subject to form questions.
Can + subject + bare infinitive ?
Can you play the piano?