Напишите 10 предложений с модальным глаголом must

You must to go to sleep.
She mustnt go to the cafe.
He must to win.
They must to smile in the stage.
Why do you must to buy this thing
You mustnt cry.
It is so beautiful dress!You must buy it!
He must to study good!
Andrew must have only good marks.
Do you must to study English