It's the 1st part of the topic Conditional Sentences. Here is a general information of forming the Conditionals and several exercises for practicing

2. What is Conditionals?
Conditionals are clauses introduced with if
The main types of Conditionals are:
 Type 0
 Type 1
 Type 2
 Type 3

3. Conditional Clause
Clause IF +
Condition
Main clause
Result

4.  You can go out if you have done all the homework.
 Flowers die if they are not watered.
 Don’t forget to switch off the light if you leave.
Type 0 (Real action)
Clause IF: Main clause
Present Simple
or Present
Perfect
Modal Verbs or
Imperative
Mood or
Present Simple

5.  If the weather is fine we will go for a walk.
 If I drink coffee tonight I won’t sleep very well.
 If you present me a teddy-bear I’ll be surprised.
Type 1 (Future action)
Clause IF: Main clause
Present Simple Future Simple

6. Open the brackets:
1. If you _______ (say) that again, I ___________ (scream).
2. I _______ (be) surprised if she _________ (manage) to sell
that car
3. If the boys ______ (come) to supper, I _________ (cook)
chicken breasts.
4. I _________ (need) some money if we _______ (go) out tonight.
5. I ________ (miss) you if we ________ (move) to Wales.
6. If you ________ (wash) up, I _________ (dry)
7. Ann ________ (be) sorry if Helen ___________ (not come)
8. If you ________ (get) lonely, I hope you _____________
(phone) me – any time.
9. It _________ (be) funny if Norman __________ (get) the job.
say will scream
will be manages
come will cook
will need go
will miss move
wash up will dry
will be doesn’t come
get will phone
will be gets

7. Complete these sentences any way
you like:
I’ll be surprised if…
I’ll be very happy if…
I’ll be sorry if…
They’ll be glad if…

8. Type 2 (Unreal Present)
Clause IF: Main clause
Past Simple or
Past Continuous
would/could
might + Present
Infinitive
 If the weather were fine (today) we would go for
a walk (today)
 If I didn’t have to work such long hours, I wouldn’t
be so tired.

11. Type 3 (Unreal Past)
Clause IF: Main clause
Past Perfect or
Past Perfect
Continuous
would/could
might + Perfect
Infinitive
 If the weather had been fine (yesterday) we would
have gone for a walk (yesterday)
 If I had been more careful, I wouldn’t have made
such a big mistake.

13. Open the brackets
1. I didn’t know you were in hospital. If ______________
(I/know) __________________ (I/go) to see you.
2. Sam got to the station just in time to catch the train to the
airport. If ____________ (he/miss) the train,
____________________ (he/miss) his flight.
3. I’m glad that you reminded me about Amanda’s birthday.
______________________ (I/forget) if ___________________
(you/not/remind) me.
4. Unfortunately, I forgot my address book when I went on
holiday. If _____________________ (I/have) your address,
__________________ (I/send) you a postcard.
I had known
I would have gone
he had missed
he would have missed
I would have forgotten you hadn’t reminded
I had had
I would have sent

14. 5. A: How was your holiday? Did you have a nice time?
B: It was OK, but _____________________ (we/enjoy) it
more if _____________________ (the weather/be) nicer.
6. I took a taxi to the hotel, but the traffic was bad.
__________________ (it/be) quicker if I _________________
(I/walk).
7. I’m not tired. If _______________ (I/be) tired, I’d go home
now.
8. I wasn’t tired last night. If _______________ (I/be) tired, I
would have gone home earlier.
we would have enjoyed
the weather had been
It would have been had walked
I were
I had been