Exercise 3: Complete the sentences with correct verb forms

3) I won't understand if she speaks Japanese to me.
4) If Peter studied harder, he would be a better student.
5) If you tell him a joke, John usually laughs for a long time.
6) If I had her number, I would call her immediately.
7) If you don't help your mum, she won't be very happy.
8) If it weren't so cold, I would go out.

Exercise 4: Use your own ideas to complete these sentences

Here are possible completions:

1) If my friend tells me a lie, I would be very disappointed.
2) Life would be boring if we didn't have friends.
3) We would go to the dentist if we had toothache.
4) If I get bad marks at school, my parents will be upset.
5) If you go to bed very late, you'll be tired tomorrow.
6) If I were taller, I could play basketball better.
7) I wouldn't be very happy if my phone broke.
8) If it snows every day next week, we won't be able to go to school.

Exercise 5: Correct the mistakes and write the correct sentences

1) Jackie always screams if she sees a spider.
(Correction: 'will see' is incorrect in this type of conditional sentence expressing habitual action)

2) He would be happier if he moved to a bigger flat.
(Correction: Second conditional requires past simple in the if-clause)

3) If he doesn't come home by eleven, I will call the police.
(Correction: First conditional requires 'will' in the main clause for future consequence)