Irregular verbs
Past Participle of "sing"
sung
They ___________________ (not / eat) so we went to a restaurant.
they hadn't/had not eaten
We _____ (sleep) for 12 hours when he woke us up.
we had been sleeping
When we arrived the film ________________________________ (start).
had started
Past Participle of "cut"
cut
We were late for the plane because we ____________________ (forgot)our passports.
They ____ (wait) at the station for 90 minutes when the train finally arrived.
they had been waiting
She ________________________________ (work) in that company for twenty years when she was made redundant.
had been working
Past Participle of "teach"
taught
When I arrived at the cinema, the film ____________________ (already/start).
the film had already started
I ______(not / walk) for a long time, when it suddenly began to rain.
I hadn't been walking
I knew I ____ (see) her on the street the other day.
had seen
Past participle of 'fall' and 'feel'
fallen / felt
I ___________________ (not / have) breakfast when he arrived.
I hadn't/had not had
How long______(learn / she) English before she went to London?
had she been learning...?
I ________________________________ (study) all day, so I was tired.
had been studying
Past particle of 'burn'
burned or burnt
The intelligence agency found the hacker who ____ (launch) the attack against their website.
had launched
The agent _____ (live) overseas for years when her identity was revealed.
had been living.
The government claimed they _____________ (look) for missing person for years when the truth finally came out.
had been looking