Помогите с заданием

Перепишите следующие предложения; подчеркните Participle 1 / Participle II и установите функцию каждого из них, т.е. укажите, является ли причастие определением, обстоятельством или частью глагола-сказуемого.

1. When passing the exam the student shows the level of his knowledge.
2. Oxford’s Colleges forming the university are very old and beautiful.
3. Some of the colleges were founded hundreds years ago.
4. He was invited to visit Cambridge after he had been chosen the man of the year.