My dog was wet and dirty. She ... outside in the rain. (play)
had been playing
We were exhausted. We ... for 3 hours. (walk)
had been walking
... long before the taxi arrived? (wait)
Had you been waiting
When my mother arrived home, my dog ... in my bed. (sleep)
was sleeping
It ... hard for several hours and the streets were very wet. (rain)
had been raining
When I arrived home, my dog ... on the carpet. (lie)
was lying
By the time I arrived home yesterday, my dog ... for me for 9 hours. (wait)
had been waiting
They ... very tired. They ... hard all day. (be, work)
were, had been working
By the time we started dinner, our dog ... already ... the turkey. (eat)
had ... eaten
I found a stray dog last week. It was dirty and hungry. It ... in the street for months. (live)
had been living