Ona bir şey olmuş olabilir.
- Something may have happened to him.
Yolda ona bir şey olmuş olmalı.
- Something must have happened to him on the way.
Geçen yılın önemli olayları nelerdi?
- What were the chief events of last year?
Dünün önemli olayları neydi?
- What were yesterday's chief events?
Yes, it did happen, but not in this year.
- Ja, das ist geschehen, aber nicht in diesem Jahr.
I always wonder what happened to him.
- Ich frage mich immer, was mit ihm geschehen ist.