1. If he *had studied* harder, he would have passed the exam. (verbo estudar no passado perfeito)
2. If they *had arrived* earlier, they would have seen the show. (verbo chegar no passado perfeito)
3. If I *had known* about the party, I would have gone. (verbo saber no passado perfeito)
4. If she *had called* me, I would have answered. (verbo ligar no passado perfeito)
5. If we *had left* on time, we would not have missed the bus. (verbo sair no passado perfeito)
6. If you *had told* me the truth, I would have helped you. (verbo contar no passado perfeito)
7. If the weather *had been* better, we would have gone to the beach. (verbo ser/estar no passado perfeito)
8. If he *had taken* the medicine, he would have felt better. (verbo tomar no passado perfeito)
9. If they *had listened* to the teacher, they would have understood. (verbo ouvir no passado perfeito)
10. If I *had brought* my camera, I would have taken pictures. (verbo trazer no passado perfeito)

1. She missed the train because she woke up late. → If she *had woken* up earlier, she would not have missed the train. (verbo acordar no passado perfeito)
2. They didn’t finish the project because they didn’t start on time. → If they *had started* on time, they would have finished the project. (verbo começar no passado perfeito)
3. I couldn’t help you because I didn’t understand the problem. → If I *had understood* the problem, I would have helped you. (verbo entender no passado perfeito)
4. He lost the game because he didn’t practice enough. → If he *had practiced* enough, he would not have lost the game. (verbo praticar no passado perfeito)
5. We didn’t go to the concert because it rained. → If it *had not rained*, we would have gone to the concert. (verbo chover no passado perfeito)
6. You failed the test because you didn’t study. → If you *had studied*, you would not have failed the test. (verbo estudar no passado perfeito)
7. She didn’t call because she forgot my number. → If she *had not forgotten* my number, she would have called. (verbo esquecer no passado perfeito)
8. They didn’t buy the house because they didn’t have enough money. → If they *had had* enough money, they would have bought the house. (verbo ter no passado perfeito)
9. I didn’t eat breakfast because I woke up late. → If I *had woken* up earlier, I would have eaten breakfast. (verbo acordar no passado perfeito)
10. He didn’t finish the book because he lost it. → If he *had not lost* the book, he would have finished it. (verbo perder no passado perfeito)