Past Perfect

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?

Example:
+ She had slept when I came last night.
- She had not slept when I came last night.
? Had she slept when I came last night?

Formula of Nominal Sentence
+ SUBJECT + HAD + BEEN+ NON VERB

- SUBJECT + HAD +NOT + BEEN+ NON VERB

? HAD + SUBJECT + BEEN+ NON VERB?

Example:
+ I had been there when the accident hapenned.
- I had not been Three when the accident hapenned.
? Had had been there when the accident hapenned?

I had = I’d
You had = You’d
We had = We’d
They had = they’d
He had = he’d
She had = She’d
It had = It’d