Ниже по $3$ предложения в каждом времени — Present Continuous, Past Continuous, Future Continuous:
Present Continuous:
- I am reading a book in the park.
- She is studying for her exam right now.
- They are preparing dinner together.
Past Continuous:
- I was reading a book when the phone rang.
- She was studying all night yesterday.
- They were preparing dinner when guests arrived.
Future Continuous:
- I will be reading a book tomorrow evening.
- She will be studying during the lecture.
- They will be preparing dinner when you arrive.