Yarın sabah derhal ayrılmalıyım.
- I have to leave first thing tomorrow morning.
Sabah derhal orada olacağım.
- I'll be there the first thing in the morning.
Sabah hemen orada olacağım.
- I'll be there the first thing in the morning.
I would help you, but I don't know the first thing about gardening.
I'll meet you first thing at the station.
... So the first thing we'll do is we're going to deal with all ...
... And the first thing I did was to go to my hotel room. ...