13. Сыграв две партии в шахматы, он собрался уходить (поднялся, чтобы уйти), сказав, что чувствует себя усталым. 14. Студентов, сделавших интересные доклады на уроке, пригласили принять участие в этой конференции.
13. Having played two games of chess, he wanted to leave (up to leave), saying that he feels tired. 14. Students who have made interesting reports on the lesson, was invited to participate in this Conference.
13. Having played two games of chess, he was about to leave (got up to leave), saying he feels tired. 14. Students who have made interesting presentations in the classroom, was invited to participate in this conference.
13. by playing a chess game, he's going to get (got up to leave, saying that she feels tired. 14. students who have interesting reports on the class, was invited to take part in this conference.