We must build this house by autumn
I must make sure cargoes reach their destination
People must take care of nature.
You must prepare the monthly sales report.
He must be on his way here.
You will have to be in the theater by 7 o’clock if you don’t want to be late.
In England, most schoolchildren have to wear a uniform.
I have to get up the next morning at seven.
I have to make a call before we leave.
Do I have to have another check-up, doctor?