1. Students study law at the University. 2. He has already graduated from the university. 3. Last year he graduated from the university. 4. The police haven't found the killer…

Конечно! Вот разбор времени глаголов в предложениях:

1. Students study law at the University.
   — Настоящее простое время (Present Simple)

2. He has already graduated from the university.
   — Настоящее совершенное время (Present Perfect)

3. Last year he graduated from the university.
   — Простое прошедшее время (Past Simple)

4. The police haven't found the killer yet.
   — Настоящее совершенное отрицательное (Present Perfect Negative)

5. For about 10 years legislators have been discussing the bill.
   — Настоящее продолженное совершенное время (Present Perfect Continuous)

6. Every year the State Duma of the RF passes a lot of laws.
   — Настоящее простое время (Present Simple)

7. In 1992 our country ratified the treaty.
   — Простое прошедшее время (Past Simple)

8. Lawyers have come to the agreement by the end of the present session.
   — Настоящее совершенное время (Present Perfect)

9. You look very thoughtful.
   — Настоящее простое время (Present Simple) (форма глагола "look")

Диалог дальше:

• What do you think about? (Настоящее простое время, Question Form)
• I think about retirement. (Present Simple)
• But you are only 25. (Present Simple)
• You only have just started your career. (Present Perfect) или "have started" — настоящее совершенное
• I know, but I have read an article which says that a sensible man started thinking about retirement at 25.
  • "I have read" — Present Perfect
  • "says" — Present Simple
  • "started" — Past Simple

Если потребуется помощь с объяснением выбора времен, я с радостью помогу!