Past Perfect Simple vs Continuous

Question 1

When we use the past perfect simple?

Answer 1

We use it to talk about the past, but when we want to refer to something that happened before

Question 2

Structure of the past perfect simple

Answer 2

😀 + had + been + past participle

Question 3

When we use the past perfect continuous?

Answer 3

We used to talk about an action that happened in the past that was interrupt

Or when an action in the pass set up another

Question 4

Structure of the past perfect continuous

Answer 4

😃+ had been+ Verb ing