attempts have been made to classify the elementary particles. 7. The studies which have been described in this paper have become classical ones. 8. Recent experiments concerning these phenomena have focused considerable attention on getting reliable data. 9. We have recently attempted a study of the feedback mechanism and have found some direct evidence against that widely spread conception. 10. In recent years a considerable number of works have appeared on various problems of elementary particle physics. 11. In recent literature the problem and prospects of this new trend in science have not been discussed exhaustively. 12. The recent advancements in instrumentation have facilitated the solution of this problem which in the past was only approached by hit and miss methods. 13. A few improvements have lately been recommended to facilitate the experiments on atomic collisions. 14. Progress in computer science has given rise to a lot of popularizing books and articles. 15. Your work has not been discussed at the laboratory seminars. 16. This conclusion has mainly been drawn from observation. 17. The inconsistency of this assumption has largely been shown by electron microscopic studies. 18. The intensive research has culminated in a few important discoveries. 19. This problem has lately been studied very intensively. 20. The problem you are studying has not been widely discussed in literature.

PARTICIPLE

Participle I

Complex Object

1. I knew this mistake being made automatically. 2. We know our dean having worked on the problem of environment since 2003. 3. We found out some data having been changed in accordance with the program. 4. I saw some students waiting for the exam results near the dean’s office. 5. The Professor knew the students having had some questions before the laboratory work. 6. The head of the computer company heard some students of Radioengineering Department trying to find a part-time job. 7. We know the best students of the university being invited to work abroad. 8. I disliked the results of the test having been announced a week later. 9. The members of the delegation knew some important documents having been signed. 10. I thought my article having been published in the university journal but I was mistaken.

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