Present Simple:
But you must help me.
You must know that by now.
But I must do as father says.
You must tell me!
I must apologize for Dulce.
You must please excuse me
We must have breakfast first.
"This is what you must do," said Boris.
That must be very interesting
I must go now to see my garden.
Past Simple:
Students had to wear uniform
She had to Learn English
They had to use mobile
You had to Operate Computer
They had to clean
I had to talk with him
She had to drive a car
They had to listen him
They had to think about her
He had to do job
We had to win