Don't have to:
You don't have to go to the shop. I have been there today.
I didn't have to get up ear;y yesterday, as I had a day off.
My eyesight is getting worse. I'll have to wear glasses.
Mustn't
You mustn't do it!
You mustn't go outside!
She mustn't walk there.
Must:
You must see this film!
She must do it every day, it is my duty.
You must wash the dishes. It's your turn.
Can:
Can you do me a favour?
Can I go there?
You can go to the park.
Need:
I don't need to do it.
Need I do it now?
He doesn't need to do his homework right now.
May:
May I come in?
May I take this toy?
May she come to the party?