Past Prefect Tense.

Past perfect tense refers to the happening or occuring of a task or activity in an unususal time.It means that it describe the happening of a task before the specific time in the past.For example;-

I had never seen him before.

Positive tense;-

Sub +had + verb 3rd form + obj.

Negative tense;-

Sub + had + not + verb 3rd form + obj.

Interrogative tense;-

Had + sub + verb 3rd form + obj+ ?