Только не “hat”, a “had”!
He had to put on his cap.
He had to make his bed.
He had to stay in bed.
She had to cook lunch.
You had to learn the words.
I had to go there.
They had to stop.
We had to work hard.
She had to come home early.
They had to write a test.
Если я ничего не путаю :)