"He had done everything a day ago."
Thank you.
It is impossible to tell whether the past perfect is called for without context. I can tell you it is not called for in your question. "I saw the following sentence …" is better.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
It is impossible to tell whether the past perfect is called for without context. I can tell you it is not called for in your question. "I saw the following sentence …" is better.
cat navy 425He had done everything a day ago.
As you say, this is strange, at least as an isolated sentence. However, it's not impossible. It depends on the context.
With the past perfect, we'd expect
He had done everything the day before.
cat navy 425I feel that "He did everything a day ago" is OK.