This document discusses conditional sentences, which consist of an if-clause and a main clause. The if-clause states a condition, and the main clause states the consequence if the condition is met. There are different types of conditional sentences. Type 1 conditional sentences, also called real or likely conditionals, refer to present or future time and express conditions that could realistically happen. Examples are provided like "If I find her address, I will send her an invitation." Negative conditions can be expressed using "unless" instead of "if not." Future time clauses refer to actions that will occur after another event, like "As soon as you arrive, call me!"

1. First type
Conditional
Sentences

2. Forms and Uses
Conditional sentences consist of two clauses:
 A conditional clause
 A main clause
If the weather is fine, we’ll go sunbathing
Conditional sentences are used to express
that the action in the main clause can only
take place if a certain condition is fulfilled in
the conditional clause.

3. TYPE 1. Real, Likely Conditionals
 They have present or future time reference.
 The main clause can actually take place if the
condition happens. The condition seems realistic
to happen:
- If I find her address, I will send her an invitation.
I want to send an invitation to a friend, I just have to
find her address. I am sure, however, that I will
find it.
If Peter has the money, he will buy a car.
It is very likely that Peter will have enough money
to buy that car.

4. Real, likely Conditionals
There are different kinds of real conditionals.
Conditional clause Main clause
Present Present
- If it rains, you get wet.
Present Future
- If I see Peter, I’ll tell him.
Present Imperative
- If you know the answer, let me know.

5. Negative Conditions
UNLESS = IF … NOT
I won´t go to the party if she doesn´t invite
me
=
I won´t go unless she invites me

6. Future Time Clauses
As soon as you arrive, call me!
We´ll make the dinner when you arrive home.
I won´t be happy until I see you again.
I´ll have a shower before I leave.
After I finish university, I´ll probably take a year off.

7. 1. If I _________(go out) tonight, I __________ (go) to the
cinema.
go out / will go
2. If you __________ ( not get back), I __________ (be) angry.
don’t get back / will be
3. If we __________ (not see) each other tomorrow, we
_________ (see) each other next week.
don’t see/ will see
4. If he _________ (come), I_______ (be) surprised.
comes/ will be
LET’S PRACTISE
Fill in the blanks with the right form of the verbs between
brackets

8. 1. If the weather _________(not improve), we __________ (not
have) a pic-nic.
doesn’t improve/ won’t have
2. They__________ ( go) to the party if they __________ (be)
invited.
will go/ are
3. If you __________ (know) the song, _________ (tell) me.
know/ tell
4. She_________ (stay) in London if she_______ (get) a job.
will stay/ gets
LET’S PRACTICE
Fill in the blanks with the right form of the verbs between
brackets