It is raining outside. You say:
It is freezing outside. You say:
John has headache. You say:
They are so tired. You say:
A burglar broke into her house. You say:
I am late for the work. You say:
We are hungry. You say:
I have toothache. You say:
You have to eat something.
You have to wear your coat.
You have to drive to work.
They have to rest for a while.
She has to call the police.
You have to go to the dentist.
You have to take your umbrella.
He has to go to the doctor.