Past perfect tense is a kind of tense that is used to describe an
Action or an event that started in a certain time in the past and
completed of finished certain time in the past too; or past perfect
tense is used to Express an Action or an event that had happened before
that other event or actionhappened.
Formula of Verbal Sentence:
(+) SUBJECT + HAD + V3
(- ) SUBJECT + HAD + NOT + V3
(? ) HAD + SUBJECT + V3?
Formula of Verbal Sentence:
(+) SUBJECT + HAD + V3
(- ) SUBJECT + HAD + NOT + V3
(? ) HAD + SUBJECT + V3?