Ex. 92 Study the examples below. Notice the use of the conjunctions introducing clauses of time

Ex. 91 Choose the correct conjunction for each sentence

Note: So long as and provided that are close in meaning to on condition that having an implication of restricting the probability of a future action by a certain condition, i.e. meaning if and only if.

Ex. 90 Study the examples below. Notice the similarities and differences in the usage of the conjunctions introducing conditional clauses

As compared to if and unless the conjunctions so long as and provided
that are typically used in more formal language.

I'll do what you say provided the police are not informed.

You can't go in unless you are a member. The club is for members only.

You can use my car as long as (so long as) you drive carefully.

Travelling by car is convenient provided (that) you have somewhere to park.

You can have the car tonight if Harry doesn’t need it.

Don't answer the door unless there's someone else in the house.

We'll arrive on time provided that the train doesn't stop again.

I'll give you the day off on condition that you work on Saturday morning.

Children are allowed to use the swimming pool unless/provided they are with an adult.

Unless/provided they are with an adult, children are not allowed to use the swimming pool.

1. I like travelling by sea so long as/unless it's not rough.

2. I don't want to be disturbed, so don't phone me on condition that/unless it's something important.

3. Please, sign the contract if/on condition that you are happy with the conditions.

4. I don't mind Guy coming with us provided/in case he pays for his own meals.

5. You can go out to play as long as/in case you stay in the back yard.

6. Unless/provided you pay the bill immediately, I'll have to call the police.

7. I'll stay with you as long as/in case there is a room.

8. You can take my car as long as/unless you don't smash it up.

9. I'll be back tomorrow on condition that/unless there's a plane strike.

10. You're welcome to stay with us as long as/in case you share the rent.

11. You'll enjoy the concert unless/provided you like Beethoven.

12. He will win easily in case/unless he loses his temper.

1. It's not worth going shopping now. By the time we get to the shops, they will be closed.

2. Hurry up! By the time we get to the cinema, the film will already have started.

3. I hope to see you before I leave tomorrow.

4. She was very rude to me. I refuse to speak to her again until she apologizes.

5. Please, report to reception when you arrive at the hotel.

6. I will pay the bills as soon as I get them.

7. He says he'll keep on working until he is 60.

8. I won't go out until I've done my home-work.

9. After the lesson has finished I'll go to the hairdresser's to have my hair cut.

10. While you are making tea I'll lay the table.

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