Нужно подчеркнуть причастие; указать его форму (Participle I, Participle II, Perfect Participle) и залог; установить его функцию (часть сказуемого, определение или обстоятельство).
1.Having been translated into Russian the novel was published.
2.Having read the article we learned much about this scientist.
3.Working in the library he found an interesting book on art.
4.My friend entering a university studies hard.
5.The young people trained at our university took part in the contest.