Question

Fill in the gaps.Use must or have to in the positive or negative form. 1. If you want to make progress,you....work regularly. 2.You....open window. If May fall. 3. I....eat more vegetables and fruit.They are good for me. 4. You....pay for this book.It's a present. 5. You....interrupt your teacher. 6. You grandmother....work. Her husband had earned enough money.

Answer 1

1. If you want to make progress, you must work regularly.
2. You mustn't open window. It may fall.
3. I must eat more vegetables and fruit.They are good for me.
4. You don't have to pay for this book. It's a present.
5. You mustn't interrupt your teacher.
6. Your grandmother didn't have to work. Her husband had earned enough money.

Answer 2

1. must
2. mustn't
3. must
4. don't have to
5. mustn't
6. doesn't have to

Answer 3

1. If you want to make progress, you must work regularly.
2. You must open the window. It may fall.
3. I have to eat more vegetables and fruit. They are good for me.
4. You don't have to pay for this book. It's a present.
5. You must not interrupt your teacher.
6. Your grandmother doesn't have to work. Her husband had earned enough money.