past perfect continuous
She was exhausted because she _____ for hours before she _____ to take a break.
By the time they arrived, the team _____ on the project for weeks.
The garden looked beautiful because they _____ it for months.
When I called, she _____ the cake for over two hours.
The kids were exhausted as they _____ in the park all day.
Before they left for the trip, they _____ their bags for hours.
By the time he reached home, she _____ dinner.
The construction workers _____ on the site since early morning.
She _____ her novel for months before she _____ satisfied with it.
The marathon runners _____ for hours before they _____ the finish line.
They were tired because they _____ the house all day.
The scientist _____ on the experiment for weeks before she _____ any significant results.
The students were relieved as they _____ on their project for a long time.
Before they found the solution, they _____ the problem for days.
He was upset because he _____ for hours before he _____ the mistake
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