Господи вообще не понимаю эти ! use must/mustn’t, may, can/can’t, should/shouldn’t, need/needn’t. 1. students leave the classroom before the ring bells. 2. you brush your teeth in the morning. 3. you pass my pencil to me? 4. you've been driving all day. you be exhausted! 5. you smoke so much. it's bad for your health! 6. i know he speaks five languages, but he speak arabic? 7. i'm on my way. i be there in about 10 minutes. 8. i afford that. 9. this be dangerous if you don't have the right equipment. 10. you yell at your parents. it's not nice

1. Students _mustn’t__ leave the classroom before the ring bells.
2. You _should__ brush your teeth in the morning.
3. _can__ you pass my pencil to me? 4. You've been driving all day. You _must__ be exhausted!
5. You __shouldn’t__ smoke so much. It's bad for your health!
6. I know he speaks five languages, but __can__ he speak Arabic?
7. I'm on my way. I __may__ be there in about 10 minutes.
8. I _can’t_ afford that.
9. This _can__ be dangerous if you don't have the right equipment.
10. You __shouldn’t__ yell at your parents. It's not nice.