The document discusses different types of conditional sentences using "if" clauses. It provides examples of conditional sentences using "if" plus the present simple, present tense verbs, past simple tense, past perfect tense, and different modal verbs like "will", "can", "may", "must", and "would". All examples express possible hypothetical scenarios and their results.

1. FIRST
SECOND
THIRD
ZERO

2. If I am late for school,
my teacher gets angry.
If clause Main clause
If + Present simple Present simple

3. If I oversleep …

4. I miss the bus.

5. If I miss the bus, I am late for school.

6. If I am late for school, my teacher gets angry.

7. If I go to London,
I will see the Big Ben.
If clause Main clause
If + Present tense will / can / may / must + verb
•

8. If I go to London …

9. I will see the Big Ben.

10. If I go to Buckingham Palace,
I can take a photo of the Royal Guard.

11. If clause Main clause
If + Past Simple would / could / might + verb
If I were an astronaut,
I would travel in a spaceship.

12. If I were an astronaut,
I would travel in a spaceship.

13. If I traveled in a spaceship,
I would go to Mars.

14. Nice to
meet you!
If I went to Mars,
I would meet a Martian.

15. If I met a Martian,
I wouldn’t understand him.
? IfI
aved

16. If I didn’t understand him,
I would come back to the Earth.

17. If I had studied hard,
I would have passed my exams.
If clause Main clause
If + Past Perfect
tense
would/could/might + have + past
participle

18. IIf you had studied hard,
you wouldn’t have failed your exam.

19. IIf you had passed your exam,
you could have gone to the beach.

20. IIf I had gone to the
beach, I would have
made sand castles.