"must-mustn't/have to-don't have to". 1) Today is Saturday. I
get up early
2) The baby is sleeping. We
be quiet
3) The kids
sleep regularly to grow healthy,
4) My father
be at work at eight o'clock. He is the boss
5) We
shout in the classroom
6) My mother doesn't let me go out. So, I
stay at home