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1. If she earns a lot of money, she will fly to New York. 

2. David will go on a picnic tomorrow if the weather is fine.

3. What will you do if you don't go away for the weekend?

4. We'll have to go without John if he doesn't arrive soon.

5. If he washes my car, I will give him 20.

6. When will you repay me if I lend you 100?

7. We will take the train to Edinburgh if it runs on time.

8. If it rains, we will cancel the match.

9. If you take the first bus, you will get there on time.

10. I will miss the school bus if I don't get up early.

11. You can catch a cold if you don't wear your coat.

12. If I came home earlier, I would prepare dinner.

13. If we won the lottery, we would fly to London.

14. If I met Brad Pitt, I would ask for his autograph.

15. If the weather is nice, they will play football.

Câu đk loại 1: If S Vs/es, S will V

Câu đk loại 2: If S V2/ed, S would V