1. This young man (had worked) at the factory before he entered the university.
2. The football match (had begun) by the time I could get to the stadium.
3. I am not feeling well, I (have caught) a cold.
4. After the doctor (had examined) the patient he wrote out a prescription.
5. Her son (has not returned) from school yet.
6. Peter is absent today, he (has fallen) ill.
7. The teacher (had explained) the students their homework before the bell rang.
8. I (had translated) this article by the time you came.
9. Jack has just (gone) to the station to meet his elder brother.
10. The scientist (had finished) this experiment by 5 o’clock yesterday.