Can you help me?
Request
He can swim like a fish
Ability
Can I come in please?
Permission
Can I have a glass of water?
Request
She can't speak chinese
Ability
Can I go to the restroom?
Permission
Can you give me a lift to school?
Request
It can ride a bike
Ability
Can I use your book?
Permission
Can you turn off the TV?
Request
They can't climb trees
Ability
Could I ask you something?
Permission
