Практикум по грамматике английского языка : учебное пособие

Clause of Condition
• if
If you travel all over the world, you’ll see a lot of fascinating places. He will 
become rich and famous if he tries hard enough.
• unless = if... not
I’ll go swimming tomorrow unless it’s cold. I’ll swimming tomorrow if it’s not 
cold.
• if ≠ in case
In case expresses the idea that something probably won’t happen, but it is 
possible. 
I’ll make a cake in case someone drops in at the weekend. (Perhaps, someone 
will drop in at the weekend; I’ll make a cake now, whether someone comes or 
not; then I’ll already have the cake.)
If expresses possible condition, with the main clause expressing result. 
I’ll make a cake if someone drops in at the weekend. (Perhaps, someone will 
drop in at the weekend; If someone comes, I’ll make a cake; But only then, 
not now.)
• provided (that)/providing (that) / as (so) long as / only if = «if but only if ’
Provided (that), providing (that), as long as, only if express the idea that 
there is only one condition which will cause a particular result.
provided (that)
He can go to university providing (that) he gets a scholarship.
NOTE:
When only if begins a sentence, the subject and the verb of the main 
sentence are inverted. Only if it rains, will we stay at home
But: We’ll stay at home only if it rains.
Exercise 44. Write these sentences, putting the verbs in brackets into 
Present Simple or Future Simple.
Example: If the train ____is_______(be) late, we _____’ll walk
(walk).
1. If this suitcase _______ (cost) too much, I ___________ (buy) a smaller 
one.
2. She ___________ (call) you as long as she ____________ (have) time.
3. I ___________ (go) to the party provided you _______________(go) too.
4. What ___________ we (do) in case the taxi _____________(not/come)?
5. I ___________ (ask) Peter if I ___________ (see) him tomorrow.

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45
6. I ___________ (not/go) next week unless I __________ (buy) a train ticket.
7. If he ___________ (see) me here, he ___________ (be) really angry.
8. Mark ___________ (be) upset if you __________ (not/come) to see him off.
9. I _________ (let) you use my car as long as you ________ (drive) carefully.
10. If it ___________ (snow) this winter, we __________ (go) skiing.
11. I __________ (not/lend) them any money unless they _________ (ask) me.
12. You ___________ (succeed) as a businessman providing that you 
_________ (get) interest ed in finance and management.
13. If you ___________ (visit) Chicago, you ___________ (see) some inter-
esting old buildings.
14. If you ___________ (not/get) enough sleep, you ___________ always 
(feel) tired.
15. In case I ___________ (pass) my exam, I ___________ (have ) a party.
16. I ___________ (not/have) a party if I ___________ (fail) my exam.
17. Provided that you __________ (train) harder, you ___________(be) on 
the team.
18. Your dad __________ (be) angry unless you __________ (get) home early.