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Các câu hỏi dưới đây có thể giống với câu hỏi trên
If I had known you were coming, I would have waited for you at the airport.
If he hadn't lost the keys, he wouldn't have had to call the emergency service.
If we had studied harder, we would have passed the exam.
If I hadn't bought the new phone, I could have saved a significant amount of money.
If you hadn't forgotten to meet me, we wouldn't have had to reschedule our appointment.
Công thức: If + Past Perfect (had + past participle), + would + have + Past Participle