Раскройте скобки, заменив инфинитив соответствующей формой глагола в Present Perfect или Past Perfect. 1. This young man (to work) at the factory before he entered the university. 2. The football match (to begin) by the time I could get to the stadium. 3. I am not feeling well, I (to catch) a cold. 4. After the doctor (to examine) the patient he wrote out a prescription. 5. Her son (not to return) from school yet. 6. Peter is absent today, he (to fall) ill. 7. The teacher (to explain) the students their homework before the bell rang. 8. I (to translate) this article by the time you came. 9. Jack just (to go) to the station to meet his elder brother. 10. The scientist (to finish) this experiment by 5 o'clock yesterday.

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