Function: It is used to describe an action that was completed before Another Pats action

Past perfect focuses on the RESULT of the action

Example: She has finished her h.w

BEFORE her parents arrived

Key EXPRESSION

-Before/-after/-By the time/ - Alredy/ - 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.

Example:

She had been studying for hours BEFORE she took a break

IMPORTANT: We need to pay attention on the ORDER and DURATION of the events

KEY EXPRESSIONS:

-For/-Since/-Before/-When/-Until

1. He had never visited Cancun until she went there last summer.

2. I had never seen a shark before I went snorkeling in Cancun.

3. We had never been to a concert before we saw our favorite band perform live.

Write 3 examples using past perfect progressive

1. They had been studying for three hours before they took a break.

2. He had been working on her project all day before she finished it.

3. He had been playing soccer for two hours before he got tired.