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