You ________________________.
You must keep off the grass.
You ________________________.
You mustn't pick the flowers.
You ________________________.
You mustn't run.
You ________________________.
You must line up in the corridor.
You ________________________.
You must keep quiet.
You ________________________.
You mustn't spit.
You ________________________.
You mustn't climb the tree.
You ________________________.
You must sit still in the school hall.
You ________________________.
You mustn't litter.
You ________________________.
You must wait for your turn.