Eğer onun adresini bilseydim, ona bir mektup yazardım.
- If I knew her address, I would write her a letter.
Onun adresini bilseydim, ona yazabilirdim.
- If I knew his address, I could write to him.
... a pretty good guess about what you do when you go to the toilet. I'm pretty sure I knew ...
... And so many girls were telling me that they never knew how to ...