By the time Sarah arrived, I _____ (finish) my homework.
By the time Sarah arrived, I had finished my homework.
They _____ (already / eat) dinner when I got home.
They had already eaten dinner when I got home.
She _____ (never / visit) Paris before last summer.
She had never visited Paris before last summer.
The train had already left when we _____ (arrive) at the station.
The train had already left when we arrived at the station.
When the movie started, I _____ (not / watch) that film before.
When the movie started, I had not watched that film before.
He _____ (just / complete) his project when the boss asked for it.
He had just completed his project when the boss asked for it.
By the time she found her keys, she _____ (search) for them for an hour.
By the time she found her keys, she had been searching for them for an hour.
They _____ (not / experience) such extreme weather conditions before they moved to Alaska.
They had not experienced such extreme weather conditions before they moved to Alaska.
The concert had already begun when we _____ (arrive) at the venue.
The concert had already begun when we arrived at the venue.
Before he met his wife, he _____ (never / travel) abroad.
Before he met his wife, he had never traveled abroad.
