Unless

Theme :Education in the world

Unit 3 : Schools, different and alike

Sequence1 :Listen and consider

               Lesson : Language Aspect « Grammar »

                                             Unless 

Unless is an alternative subordinating conjunction for some conditional clauses. It has a negative meaning, often the same as If....... not. Unless can only be used in real conditions.

 If you don’t hurry, you will be late

A         Unless you study hard this term, you are unlikely to pass the exam.

B          If you don’t study hard this term, you are unlikely to pass the exam.

REWRITE THE FOLLOWING SENTENCES, USING UNLESS INSTEAD OF IF ...NOT.

1. If you don’t know the answer to the question, don’t put your hand up.

Unless you know the answers to the question, don’t put your hand up.

2. If it doesn’t rain tonight, we’ll water the trees tomorrow.

Unless it  rains tonight, we’ll water the trees tomorrow.

3. If he doesn’t wear his scarf and his jumper, he will catch a cold.

Unless he wears  his scarf and his jumper, he will not catch a cold.

4. A man can’t join the army if he isn’t in a good health.

A man can’t join the army unless he is in a  good health.

5. If you don’t phone me from London twice a week, I will be really upset.

Unless you  phone me from London twice a week, I will be really upset.

6. If the bridge hasn’t been repaired, we won’t be able to cross the river.

 Unless the bridge has been repaired, we won’t be able to cross the river.

7. We will be late if we don’t take a taxi.

We will be late unless we  take a taxi.

8. If you don’t tell me what’s wrong, I can’t help you.

Unless you  tell me what’s wrong, I can’t help you.

9. If there aren’t any problems with my visa, I’ll be off to New York next month.

Unless there are any problems with my visa, I’ll be off to New York next month.

10. Don’t board the train if you haven’t bought a ticket.

Don’t board the train unless you have bought a ticket.