Gone; gone by; gone away; passed; passed away.
The word 'ago' is correct and usable in written English. It is used to express the amount of time that has passed since an event took place. For example, "I visited this city two years ago".
"It's only what happened a couple of weeks ago or next week that matters.
Forbes ranks it as the second-largest private company in the country, after Cargill, and its consistent profitability has made David and Charles Koch—who, years ago, bought out two other brothers—among the richest men in America.
"A long time ago".
That was three years ago".
What happened four months ago is forgotten, whether that's good, bad or indifferent.
"They gave me their word a year ago and now I want them to honour that.
"Five years ago I stood here and said we had made history here in Brighton," Lucas said to loud cheers inside the Brighton Centre conference venue.
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.
Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com