Ответ:

  1. My sister is baking broccoli; she never eats it.
  2. Be quiet! Dad is sleeping in the living room. He is trying to get some rest after a long day.
  3. We have already bought the tickets for the concert. Now we can’t wait for Saturday.
  4. How long have you been learning English? — I have been studying it for five years.
  5. The book belongs to my grandmother. She has kept it since she was a teenager.

Правило: Present Simple употребляется для привычек и постоянных фактов; Present Continuous — для действия сейчас; Present Perfect — для результата или связи прошлого с настоящим; Present Perfect Continuous — для действия, которое началось в прошлом и продолжается до настоящего момента.