The document discusses different types of conditional sentences in English. It describes the zero conditional, which expresses general truths, using the present tense. The first conditional expresses probable future events using "if + present tense" and "will + infinitive". The second conditional describes unlikely or imaginary situations using "if + past tense" and "would + infinitive". It provides examples for each type of conditional sentence.

1. CONDITIONAL
SENTENCES
If Clause

2. The condition & The result
• Which is which?
• If a large comet hit the
Earth,
• human would very soon
die out.

3. The Zero Conditional
• Something that is or was generally true
(It means “whenever”)
• If I eat fish, I get ill.
• If I didn’t eat my meals, Mum got cross.
• FORM
• If + present tense, present tense
• If + past tense, past tense

4. The Zero Conditional
• The imperative
• Tell her about the party if you see her.
• If he is here, tell me immediately.
• If you’re going out, buy me some milk.

5. The First Conditional
• Describes real or probable future situations
• If it rains, I won’t go out.
• If you’re going shopping, will you buy me some milk?
• If he’s had enough, he’ll stop.
• FORM
• If + present tense, will + infinitive

6. The First Conditional
• When and as soon as can replace if
• If I see her, I’ll tell her.
• When I see her, I’ll tell her
• As soon as I see her, I’ll tell her.
• Will can be replaced to show something is less certain
• If you out now,
you may/ might see her.
• If I pass my exam,
we can/could celebrate.

7. The Second Conditional
• Describes imaginary or unlikely situation
• If I knew, I’d tell you.
• If I won a lottery, I would travel around the world.
• If I were you, I’d apply for the job.
• If he were here, what do you think he’d do?
• FORM
• If + past tense, would + infinitive
• What would Jesus do?

8. The Second Conditional
• Would can be replaced  less certain
• If I went to Africa, I might see wild elephants.
• If I had enough money, I could go round the world.

9. Other points
• Conditions are not always stated.
• I’d love to meet your brother.
(if you let me)
• The choice often depends on the speaker’s view of the
situation
• Example:
Two people buy lottery tickets every week.
• A: If I win, I’ll give up my job.
• B: If I won, I’d move to the country.