:)+had+p.p.v+complement

Describe an action that was completed before another past action

Past perfect focuses on the result of the action

Ex:

She has finished her homework before her parents arrived

Key Expressions:

Before, after, by the time, already, just

FUNCTION:

It is used to describe an action that was ONGOING before another past action

Past perfect progressive focuses on the DURATION of the action

EX: She had been studying for hours before she took a brake

IMPORTANT:

We need to pay attention in the orden and the duration of the events

KEY EXPRESSIONS:

For, since, until , before, when

She had a meeting last week

He had played soccer once

They had studied all night

Past perfect progressive:

They had been running before they get tired

He had been singing before his father told him to stop

I had been playing the guitar before I fall asleep.