While I _________ (walk) to school, I saw an old friend.
had walked
was walking
walked
They _________ (leave) before we arrived.
left
had left
were leaving
He _________ (forget) his umbrella at home this morning.
was forgetting
forgot
had forgotten
We _________ (arrive) at the airport two hours ago.
arrived
had arrived
were arriving
We _________ (have) dinner when the lights went out.
had had
were having
had
By the time she called, I _________ (already/go) to bed.
already went
was already going
had already gone
She _________ (already/eat) dinner before we invited her.
already ate
had already eaten
was already eating
I _________ (finish) my homework before my mom got home.
finished
was finishing
had finished
They _________ (never/be) to Paris before their honeymoon.
had never been
were never
never were
She was really tired because she _________ (study) all night.
was studying
studied
had studied
She _________ (finish) her homework and then watched TV.
had finished
finished
was finishing
He _________ (work) there for five years before he quit.
was working
had worked
worked
I _________ (lose) my keys yesterday and couldn't get into my house.
was losing
had lost
lost
He fell asleep while he _________ (watch) TV.
watched
was watching
had watched
The teacher _________ (explain) the lesson and then gave us some exercises.
explained
had explained
was explaining
While they _________ (play) football, it started to rain.
had played
were playing
played
She _________ (wait) for an hour before the bus came.
waited
was waiting
had waited
I _________ (read) when my phone rang.
read
was reading
had read
When he entered the room, everyone _________ (talk).
had talked
talked
was talking
We _________ (have) dinner at a nice restaurant last night.
had
were having
had had
I _________ (see) that movie before, so I didn’t want to watch it again.
had seen
saw
was seeing
By the time we arrived, the movie _________ (start).
had started
was starting
started
We were tired because we _________ (walk) all day.
were walking
had walked
walked
Before we moved here, we _________ (live) in London.
were living
lived
had lived
They _________ (buy) a new car last weekend.
had bought
bought
were buying