1.
Can you play the piano?

Yes, a little. How about you?

No I can't, but I can play the guitar.
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2.
Can you cook?

Not really. I can make toast and pasta, that's all.

Everyone can make toast!

Well, can you cook?

Yes, I can. I can cook delicious fish and chicken.

Wow, that's great.
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3.
So what can you do?

I can draw, and I can paint really well too. I can also speak English and Korean. How about you?

I can play chess and I can write computer programs. I can also speak English and Spanish.

Excellent!

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can
play
piano
can't
guitar
cook
delicious
fish
wow

draw
paint
Korean
chess
write
computer
computer program
Spanish
excellent

Can is a kind of auixiliary verb called a modal verb. Modal verbs express a particuilar character or mood of a verb.

Can is often used to show ability. For example: "We can speak English", or "He can sing well."

Here are the Simple Present forms of can for ability.

I can play the piano.
She can drive a car.

I cannot play the piano.
She cannot drive a car.

Can you play the piano?
Can she drive a car?

Cannot and can't are the same: eg.
- I cannot cook well.
- I can't cook well.
Can't is much more common in spoken English.

Can is also used to show permission. For example: "You can go home after class". Here are the Simple Present forms of can for permission.

You can meet her tommorrow. - (You have permission to meet her).


Negatives

She can't come to our house. - (She doesn't have permisson to visit us).

Can we go to the movies? - (Please give us permission to watch a movie).