Tom yeni bilgisayarın ne kadara mal olacağını kesin olarak bilmiyordu.
- Tom didn't know for certain how much the new computer would cost.
Tom nereye gitmesi gerektiğini kesin olarak bilmiyordu.
- Tom didn't know for certain where he should go.
For certain.
... They reward a certain kind of serendipity, ...
... be in this certain room at this certain part of town and it has to be, you know, all one ...