1 - He asked silly questions at last party.
He has just asked me a silly question.
2 - She spoke German at last meeting.
She has already spoken German and she is going to speak English.
3 - They were in their room 10 minutes ago.
They have been in their room many times.
4 - They didn't drive Alex's car.
They have already driven Alex's car.
5 - Sasha didn't forget to do his homework.
Sasha hasn't forgotten to do his homework yet.