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.