When expounding remarks or points, I'm not sure whether one can say: First, .... Secondly,... Thirdly...., or one must say: Firstly,... Secondly.... or First, ... Second...
I've seen and employed the first option, but I don't know if it is grammatically correct.
Thanks,
Sextus
Top answer
When I use them, I make them rhyme...
— Pieanne
When I use them, I make them rhyme...
Free · every Monday
Get the Weekly English Kit 📬
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.