Where does this definition of past perfect come from?
This entry for past perfect is sourced from Main Dictionary, one of the dictionaries and corpora merged into Lughet.
Is past perfect a noun, verb, or something else?
In this entry, past perfect is tagged as 2n..
What is Lughet?
Lughet is a free trilingual dictionary covering nearly five million entries across Uyghur, Chinese, and English, drawn from more than ten source dictionaries and corpora.