1. Tom always goes home late, so his mother is angry.
2. It is necessary for you to practice English every day.
3. If she tries her best, she will pass the exam.
4. If the weather is not fine tomorrow, we will not play football.
5. Have you ever seen Bill Gates?
6. I really enjoy listening to music because it helps me relax.
7. If we have enough money, we can buy an expensive car.
8. I did not go to school last Monday because I had a bad cold.
9. Did you send her a letter yesterday?

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Câu điều kiện loại 1: If + S + V(s/es), S + will + V
Câu điều kiện loại 2: If + S + V-ed/V2, S + would + V
Câu điều kiện loại 3: If + S + had + V3, S + would + have + V3
Câu phủ định: S + did not + V
Câu hỏi: Did + S + V?

@Chidat5A