Henry74 Would you consider the construction It used to be casual, or can I use it in writing? You can certainly use it in writing, as thousands already have. The more concise form (below) is more "high-class", though, as you have accurately guessed.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Henry74Would you consider the construction It used to be casual, or can I use it in writing?You can certainly use it in writing, as thousands already have.