Предложения с модальными глаголами.

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.