I might go to the park.
We could do this task.
Sould you go to the theatre?
I have to take care of him.
Would you like to drink tea?
May I come in?
Can you play the piano?
Have you got a sister?
We must take care of our parents.
May we play ball here?
You ought to be polite!
I have to help him with his task.
They might sleep in the big room.