Past Perfect Simple

S + have + V3

S + had + V3

S + had + V2

S + have + V2

The police had catch the pickpocketer.

The police have caught the pickpocketer.

The police had caught the pickpocketer.

The police caught the pickpocketer.

The thieves had stolen a masterpiece from the museum.

The thieves had stole a masterpiece from the museum.

The thieves have stolen a masterpiece from the museum.

The thieves stole a masterpiece from the museum.

I came

The shop had closed

closed by the time

The time I came

The train had

Mary arrived

left before

The train had left

Mr Hammond had driven

policeman said

Mr Hammond had

hrough a red light

Had + S + V3

Had + S + V2

Have + S +V3

S + Had + V3

Had he did his homework?

Did he do his homework?

Have he done his homework?

Had he done his homework?

Have they came yet?

Had they came yet?

Had they come yet?

Did they come yet?