Can I have ice cream before lunch?
Sure. Why not?
Can I play video game now?
Of course.
Can I copy your homework?
Yes, you can. You can copy my homework.
Can I go to Jay's house?
Absolutely not.
May I go to the restroom with my friend?
Yes, you may. You may go to the restroom with your friend.
Can I sleep at your house tonight?
Yes, you can. You can sleep at my house tonight.
May I have a piece of your cake?
No, you may not. You may not have a peice of my cake.
Can I go out with friends?
Certainly.
Can I get some water?
No, you can't. You can't get any water.
Can I pet your dog?
Yes, you can. You can pet my dog.
Can I use my cellphone?
No, you can't. You can't use your cellphone.
May I borrow a pencil?
No, you may not. You may not borrow a pencil.
May I go to the shopping mall with my friends?
No, you may not. You may not go to the shopping mall with your friends.