AFFIRMATIVE:
I had learned
You had learned
He,she,it had learned
We had learned
You had learned
They had learned
NEGATIVE:
I had not learned (I hadn't learned)
You had not learned
He,she,it,had not learned
We had not learned
You had not learned
They had not learned
INTERROGATIVE:
Had I learned?
Had you learned?
Had he,she,it learned?
Had we learned?
Had you learned?
Had they learned?
To structure the PAST PERFECT TENSE, we must use auxiliary HAD + the PAST PARTICIPLE form of the verb.
For REGULAR VERBS,the Past Participle ends in ED. For IRREGULAR VERBS, consult the list of Irregular verbs.
When we use this tense, the Past Perfect becomes the framework in which we insert a second event which happened after the first event in the past (Past Tense).
The PAST PERFECT TENSE represents the more DISTANT past; The PAST TENSE represents the more RECENT event.
Examples:1. Lorraine HAD REHEARSED her part in the play several times(more distant past) and GAVE a masterful performance.(more recent past).
2. HAD you and Robert CONSULTED an architect (more distant past) before you HIRED a construction crew? ( more recent event)
3. Michelle HAD STUDIED hard for the exam, that's why she GOT an 'A'.
4.The students CAUGHT the last train home because, luckily, the train HADN'T LEFT the station yet.