The first thing I did was turn on the lights.
the first thing I did
idiomyou use this to talk about the very first action you took in a sequence of events.
When I arrived at the hotel, the first thing I did was check the view from my balcony.
Upon discovering the error in the financial report, the first thing I did was contact the department head to initiate an immediate review of the data.
Last updated April 22, 2026