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1.6. Purpose

1. He went to France to learn French.

2. He sent his sons to a boarding school in order/so as to have some piece. (He, not his sons, was going to have some peace.)

Compare:

He sent his sons to a boarding school to learn to live in a community. (Not he but his sons were to learn to live in a community.)

He sent a telex in order/so as not to waste time.

3. They left the door open in order for me to hear the baby.

4. I have lit the fire in order that/so that the house will be warm when they return.

I recorded the match so that I could watch it later.

Criminals usually telephone from public telephone boxes so that the police wan't/can 't/don’t trace the call.

He changed his name so that his new friends wouldn’t/couldn't/shouldn't know that he had once been accused of murder.

5. Computers are used for processing information.

  1. went to the shop for some bread.

6. I lived in the city centre to avoid being too far from my job.

She locked herself in her room to prevent him (from) disturbing her.

7. I always keep candles in the house

in case there is a power cut.

They left early for fear that they would meet him.

  1. to-infnitive clauses are most frequently used to express purpose.

  2. so as / in order are not very common. They are used when there is a personal ob­ject but we want the infinitive to refer un­ambiguously to the subject.

However it is more usual to say: He sent his sons to a boarding school because he wanted to have some peace.

In order/so as construction is essential with a negative infinitive to express a nega­tive purpose.

  1. in order for...to can be used when the subject of the infinitive clause is different from the subject of the main clause.

  2. in order that (more formal)/ so that clauses are necessary when the person to whom the purpose refers is different from the subject of the main clause, or when the original subject is stated again.

When the main verb is in a present or fu­ture tense will/can/may( form.)/ shall(form.) or present simple are used in the subordinate clause.

When the main verb is in a past tense woulil/could/niight/should are used.

  1. The purpose which something serves for (general purpose) is often indicated by for+-ing-form or a noun).

  2. avoid+ing-form (verbal noun), or pre- vent+0+from+ing-form are used to ex­press negative purpose.

  3. In case and for fear that are used to re­fer to an action carried out as a precaution against something.

Exercise 1. Purpose clauses: SO AS, IN ORDER, so THAT, IN ORDER THAT, IN CASE, FOR FEAR THAT. Combine each of the following pairs of sentences into one sentence.

Example: He turned out the light. He didn’t want to waste electricity. He turned out the light so as not to waste electricity.

  1. He tied a knot in his handkerchief. He hoped that this would remind him to meet the train.

  2. He killed the men who helped him to bury the treasure. He wanted nobody but himself to know where it was.

  3. He left his rifle outside. He didn't want to frighten his wife.

  4. We had no cups but he gave us coconut shells. He said we could drink out of them.

  5. He rushed into the burning house. He wanted to save the child.

  6. He read only for short periods each day. He didn't want to strain his eyes.

  7. The farmer put a scarecrow up in the Field. He wanted to frighten the birds.

  8. The boys are collecting sticks. They intend to put them on the fire.

  9. He changed his address constantly. He wanted to elude the police.

  10. They evacuated everybody from the danger zone. They wanted to reduce the risk.

  1. .He sent his children to his sister’s house. He wanted them to watch the televi­sion programme.

  1. The town council has forbidden coal fires. They are trying to keep the air clean.

  2. He invented a wife and six children. By this trick he hoped to avoid paying income tax.

  3. He didn't tell her he was going up in the spacecraft. He didn’t want to alarm her.

  4. Put the cork back. Someone may knock the bottle over.

  5. The airfield authorities have put arc lights over the damaged runway. They want repair work to continue day and night.

  6. You ought to take some serum with you. You may get bitten by a snake.

  7. We keep a spade in this house. There may be a heavy fall of snow in the night.

  8. We put bars on the lower windows. We didn’t want anyone to climb in.

  9. You should carry a jack in your car. You may have a puncture.

21.She tied a bell round her cat's neck. She wanted the birds to know when he was approaching.

22.1 have put wire over my chimney pots. I don't want birds to build nests in them.

23. The burglar cut the telephone wires. He didn't want me to call the police.

24.The manufacturers have made the taps of their new gas cooker very stiff.

They don't want young children to be able to turn them on.

  1. 5. Never let children play with matches. They may set themselves on fire.

26. The debate on education has been postponed. The government want to dis­cuss the latest crisis.

27. The policeman stopped the traffic every few minutes. He wanted the pedes­trians to be able to cross the road.

28. Barbara jammed on the brakes. She didn’t want to run over the cat. (for fear)

29. The police have barricaded the main streets, because they didn’t want the demonstrators to march through the town. (prevent)

  1. . There’s no sense boring you any longer with the exercise, so it’s the last sentence. (avoid)

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