УКАЖИТЕ ВРЕМЯ И ЗАЛОГ У ГЛАГОЛА!
1) I have attended lectures on history since May.
2) I attended lectures on history in May.
3)He has entered the Institute this year.
4) He entered the Institute last year.
5) Have you passed your examination?
6) Did you pass your examination on Friday well?
7. He has already returned to Moscow.
8. He returned to Moscow five days ago.
9. They haven 4 received any good results.
10. They didn't receive any good results when they worked with this type of equipment.
11. The temperature has been maintained at the point of 20 degrees since the beginning of the experiment.
12. During the experiment the temperature was maintained at the point of 20 degrees.
13. Has the new apparatus been already installed in the laboratory?
14. When was the new apparatus installed in the laboratory?
15. The new apparatus had already been installed when the delegation arrived.

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