Must, mustn't, have to, don't have to

In school, you ______________ be on time for lessons.

When you play sport, you __________ wear the wrong clothes.

At break times, you ___________ go outside if the weather is good.

If the Head Teacher comes into your class, you ___________stand up.

In the school library, you ____________ work very quietly.

At lunchtime, you _____________eat in the school cafeteria – you can also eat

outside

In science experiments, you ___________ do silly things with the chemicals and equipment