Can/can't - Ability
CAN / CAN'T shows ability, inability, request, permission, possibility, and inappropriateness. In this unit we will focus on ability and inability.
CAN - Ability

- You can play tennis
- She can sing very well
- He can ride a horse

- It can jump over the wall
- We can cook Lasagne
- You can read very quickly
- They can dance flamenco
CAN'T - Inability
- I can't speak Portuguese.
- You can't cook sushi
- She can't dance very well
- He can't ride a motorbike
- It can't breathe out of the water
- We can't play the guitar.

- You can't write very quickly.
- They can't sing Soul.