His clothes were dirty because he ................. (work) in the garden.
had been working
The roads were blocked in the morning. It ................... (snow) all night.
had been snowing
The doctor asked me how long I (have) ................... the symptoms.
had had
Adam and Natalie ____ (know) each other for years when they started dating.
had known
When I got home, the children had already ___ to bed.
gone
They got to the beach after they .................... (walk) for hours.
had been walking
I had to have a break. I ........................ (drive) so long.
had been driving
She answered all of the questions in the exam because she ____________ (study) very well.
had studied
I needed a change. I ____ (live) in New York for a long time.
had been living
I was delighted when I found my keys. I ................. (look) for them for hours.
'd been looking
He couldn’t believe his eyes! His father _____________ (buy) him a new laptop as a birthday gift.
had bought
We ___ been out long when it started to rain.
hadn’t