Perfect Tenses

1. He has just checked the result. 2. They have already studied this feature. 3. I have changed the order. 4. When you come they will have solved the problem. 5. They had built the machine before the engineer arrived. 6. We had already considered that question by that time. 7. She had not considered those questions yet, a.I had seen him be­fore I came here. 9. She has not used this system yet. 10. The professor has given us an interesting lecture. 11. They will have held a conference by the 1st of May. 12. She will have translated the article by 5 o'clock.

Exercise 2. Put the verbs in brackets into the Present, Past or Fu­ture Perfect Tense.

1. Will you be free at 11.30? – Yes, the meeting (to finish) by that time. 2. I (to lose) my key. I can’t find it anywhere. 3. They thought that some people (to be) in that place before them. 4. By the end of the century, this village (to develop) into a small town. 5. We (not begin) to study for the test yet. 6. Come and see me at ten. I (to finish) my homework by then. 7. He explained that he (to forget) Ann’s telephone number. 8. I (to buy) a new car. Do you want to see it? 9. If he is not careful, he (to spend) all his money before the end of his holiday. 10. It seemed to Bill that he (heard, had heard) that music somewhere before. 11. Jorge (read) the newspaper already.12. If we don’t hurry, the film (to start) by the time we arrive. 13. Jack saw a tree that somebody (to cutdown with an axe. 14. I (to cut) my finger. It’s bleeding.