Past Perfect Continuous Exercises

He ______________ (study) for six hours before the exam.

She ______________ (work) in the garden all morning.

By the time I arrived, they ______________ (play) tennis for two hours.

We ______________ (wait) at the airport for four hours before the flight was canceled.

The chef ______________ (cook) dinner for the guests since early afternoon.

She had been practicing the piano before her concert was held.

By the time he visited, I had been cleaning the house for hours.

They had been traveling for days before they finally reached their destination.

The kids were exhausted because they had been playing on the playground all afternoon.

The construction workers had been working on the skyscraper since the end of last year.