must / have to

I...leave now

Children...clean their room

He ... earn money for his family

I...to wear glasses for reading

You...turn left here

Pupils ... eat their lunches outside the canteen

You ... listen to the teacher

We ... walk all the way home because we can't catch a taxi

She ... visit her dentist last Monday

You ... speak here. 

I will ... work

I ... get up at five every Sunday