Past Perfect

We use "Past Perfect" in the following situations:

1. To talk about an action that started in the past wich is before another action.

"I had read the news on internet before I watched it on the TV"

"she had known him before he became famous.

 

2. To talk about actions that happened in a specific time in the past.

"I had already taken a shower when my mom arrived at home".

Structure:

(+) Affirmative: Subject + had + verb(participle form) + complement.

(-) Negative: Subject + had/hadn't + verb(participle form) + complement.

(?) Interrogative: Had + subject + verb(participle form) + complement.