Past Perfect Simple

Normally, you get two actions in the Past:

1 - you did grammar exercises at home

2 - you learnt about Past Perfect at school


So, what's the oldest action here?


First,  you learnt about Past Perfect then you went home to do more exercises.

If I asked you to join the two sentences into one, how would you do it?

After we had learnt Past Perfect in class, we went home to do more exercises. 

Structure: Had + Past Perfect

Let's check if you got this. Click here (1) anf then here (2)

Past Perfect Simple

Past Perfect is used to express an action that occurred before another one in the past. For instance, check this example:
When I arrived to the station, the train had already left. 
               recent action                 oldest action

There are time expressions that are used with this tenses: for, since, just, when, never, until,etc. 

After analysing this, are you able to tell us the formula of this verb tense? 

had + past participle

Now, watch this video: