Практикум по грамматике английского языка : учебное пособие

Exercise 47. Complete the following sentences with if or in case. Prove 
your choice.
Example: We’ll visit Robert if we have some free time.
(We’ll probably have some free time. If we do, we’ll visit Robert.) 
I’ll take my umbrella in case it rains later on.
(It will probably rain later on. I will take my umbrella now, whether it 
rains or not; because if it rains, I don’t want to get wet in the rain.)
1. Take some sandwiches __________ you get hungry.
2. I’ll take you to the swimming pool ________ you hurry.
3. ________ it’s their wedding anniversary, I’ll send them a card.

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4. I’ll never speak to you again __________ you tell anyone about my secret.
5. _________ you see Marina, give her a message from me, please.
6. Will she go to college __________ she has good grades in her exams?
7. __________ it’s windy, Derek will go windsurfing.
8. You’ll buy fresh fish __________ you go the market early.
9. _________ I pass a greengrocer’s, I’ll buy some strawberries.
10. Dave’s boss will fire him _________ he doesn’t treat his clients properly.
11. Bob will ring me __________ there’re any problems.
12. Will you be upset __________ he doesn’t come?
13. We’ll walk home __________ we miss the last train.
14. We’ll close all the windows _________ it rains while we’re out.
15. You should carry some kind of identification with you __________ you 
have an accident.
Exercise 48. Complete the following dialogue using if or when. 
– What time are you coming on Saturday, Harry?
– I’m not sure yet. There’s a train from Bath at 10 am. _________ I take that 
one, I’ll arrive at 12.30 am.
The next train is at 11.45 am. 
_________
I take that one, I won’t be there until 
2 o’clock.
– Will you phone me _________ you know which train you’re catching? I’d 
like to meet you at the station ___________ you arrive.
– Well, I’ll phone you tomorrow. But __________ I don’t, I’ll phone you on 
Thursday evening. OK?
– All right. What would you like to do __________ you are here on Saturday?
– Shall we go for a walk ____________ the weather is fine?
– Sure. We could go to the zoo ___________ you like!