1. If we go to London, we will visit my friend George.
2. If she does well in her exams, my sister will go to university.
3. Jenny won't eat supper if she eats all that ice cream.
4. My brother will drive us to the cinema if we ask him.
5. Uncle Tim will phone us if he wants to come with us.
6. If my aunt comes to visit, she will give us a present.
7. If it doesn't rain, we will go to the beach.
8. If it snows tonight, we will make a snowman tomorrow.
9. If you don't try, you won't succeed.
10. If you bring the sandwiches for the picnic, I will bring the drinks.
11. If he talks too long, his parents won't let him use the phone.
12. He will turn on the heater if it gets too cold.
13. You won't understand the questions unless you read the book.