1.If you want to make progress,you must eork regularly.
2.You musn't open this window.It may fall.
3.I have to eat more vegetables and fruit.They are good for me.
you mustn't iterrupt your teacher.
my grandmother hasn't work.
1. He will go out when the weather gets warmer.
2. I'll wait for you until you come back from school.
3. I'm afraid the train had started before we came to the station.
4. We will go to the country tomorrow if the weather is fine.
5. We will not pass the examination if we don't work much harder.
6. If you don't drive more carefully, you will have an accident.
7. You'll be late if you don't take a text.
8. I had finished reading this book before I went to bed.
9. You must send us a telegram as soon as you arrive.
10. We will have a picnic tomorrow if it is a fine day.
11. We'll go out when it stops raining.
12. We will not have dinner until you come.
1e. I'm sure they'll write to us when they know our new address.