Past participle
Sing
Sung
Forget
Forgotten
His English was perfect. He (was studying/had been studying) it since he started school.
His English was perfect. He had been studying it since he started school.
They........... (be) tired because they.............(dance) all night at the club.
They were tired because they had been dancing all night at the club.
Fight
Fought
Mean
Meant
I had to have a break. I (drove/had been driving) so long.
I had to have a break. I had been driving so long.
I...................(wait) for hours so I was really glad when the bus finally...............(arrive).
I had been waiting for hours so I was really glad when the bus finally arrived.
Swim
Swum
Ride
Ridden
When we moved to Park Street, the Johnsons ................ (live) there for years.
When we moved to Park Street, the Johnsons had been living there for years.
He............ (feel) ill for days before he.........(decide) to go to the hospital.
He had been feeling ill for days before he decided to go to the hospital.
Throw
Thrown
Fly
Flown
Carol had a detailed map in her handbag but she............(leave) her glasses at home and could not read it.
Carol had a detailed map in her handbag but she had left her glasses at home and could not read it.
Tim..............(not work) for long in the office when he........... (become) the boss.
Tim hadn't been working for long in the office when he became the boss.
Hide
Hidden
Shine
Shone
Sarah got lost because she ...............(never be) to Dublin.
Sarah got lost because she had never been to Dublin.
...................(you/look) for long before you............ (buy) that great dress?
Had you been looking for long before you bought that great dress?