Note: the past perfect tense is also called the pluperfect.

Positive statements

	Singular	Plural
1st person	I had eaten ..	we had eaten ..
2nd person	you had eaten ..	you had eaten ..
3rd person	he/she/it had eaten ..	they had eaten ..

Negative statements

	Singular	Plural
1st person	I hadn't eaten ..	we hadn't eaten ..
2nd person	you hadn't eaten ..	you hadn't eaten ..
3rd person	he/she/it hadn't eaten ..	they hadn't eaten ..

Questions

	Singular	Plural
1st person	had I eaten .. ?	had we eaten .. ?
2nd person	had you eaten .. ?	had you eaten .. ?
3rd person	had he/she/it eaten .. ?	had they eaten .. ?

Note that the third form of the verb is used in all forms of the past perfect.

Back to the explanation of the uses of the past perfect.