Bunun seni bu kadar üzeceğini bilseydim bundan bahsetmezdim.
- If I knew it was going to upset you so much, I wouldn't have mentioned it.
Onun adresini bilseydim, ona yazabilirdim.
- If I knew his address, I could write to him.
... before we knew whether this was a spontaneous demonstration, or actually whether it was ...
... And I knew exactly where it is. ...