Tom saat kaçta varması gerektiğini kesin olarak bilmiyordu.
- Tom didn't know for certain what time he should arrive.
Tom yeni bilgisayarın ne kadara mal olacağını kesin olarak bilmiyordu.
- Tom didn't know for certain how much the new computer would cost.
For certain.
... away or making certain guns illegal. We, of course, don't want to have automatic weapons, ...
... I -- sometimes I -- I'll plan months ahead for certain ...