Singular	Plural
I had walked	we had walked
you had walked	you had walked
he/she/it had walked	they had walked

Singular	Plural
I had slept	we had slept
you had slept	you had slept
he/she/it had slept	they had slept

Singular	Plural
I had been	we had been
you had been	you had been
he/she/it had been	they had been