This document contains an answer key for an English exercise book. It provides the answers to 5 exercises testing past perfect tense verbs. The exercises cover using past perfect to talk about actions that happened before other past actions, distinguishing past from past perfect, and using past perfect continuous to discuss actions that were ongoing up until a point in the past. The answer key provides the correct verb forms and tenses for 50 questions testing these grammar points.

1. Answer Key
Answer Key
english course Book Three - Lesson Three
Answer Key to Practice A3
1
(Pag. 46 - 47)
Exercise I
1. They had bought a new computer when they left the store.
2. He had made an appointment with Ms. Sanders before he talked with her.
3. By the time Suzy was 16, she had learned to drive.
4. As soon as the woman had heard the news, she fainted.
5. I called my friends after I had found out the final results.
Exercise II
1. Was – had gone
2. Did – recognize – had changed
3. broke
4. did – beat – had never played
5. had broken – called
6. was – hadn't seen
7. Had – gone – had just finished
8. didn't – accept – had just had
9. Did – like – had already started
10. Did – come – had made
Exercise III
1. She had been crying.
2. He had been jogging.
3. They had been running
4. We had been looking for it.
5. He had been fixing his car.
6. She had been eating too much.
7. He had been fighting.
8. She had been swimming.
9. I had been painting the garage.
10. He had been working out.

2. Answer Key
Answer Key
english course Book Three - Lesson Three
Answer Key to Practice A3
2
(Pag. 46 - 47)
Exercise IV
1. The kids had been studying for two hours when I got home.
2. Sharon had been swimming for four years when she won her first race.
3. I had been teaching for three years when I became an academic coordinator.
4. Billy had been playing chess for three months when he won his first chess
tournament.
5. Tina had been writing her story for four days when she finished it.