Modal Verb: CAN
CAN: For Permission.
Can I + Verb + Complement?
Can I go to the bathroom?
Can I use my cellphone?
Can I go out with my friend?
Can we go to the cinema tonight?
CAN: For Abilities
Subject + Can + Verb + Complement.
Birds can fly.
Turtles can live long time.
Cats can climb trees.
A parrot can talk.
Can not = can't
Mi dog can't fly.
Chickens can't swim.