Past perfect tense

I had completed my graduation by 2015.

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He had already written four books by March.

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Andrés and I had watched the whole movie by then.

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They had arrived the school before the bell rang.

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The boys had caught two fish by the time it started raining.

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• Yesterday I had slept before the film started.

• Until Anna met Mark, she had never been in love.

• She had finished her work before the guests arrived.

• The concert had already begun when we entered the stadium.

• I had not eaten at that restaurant before today. (not /eat)

• I had known how to cook since when I was 8.

• 1. She had finished her work before the guests arrived.

• 1. The concert had already begun when we entered the stadium.

• I had not eaten at that restaurant before today.

I washed the floor when the painter _________ __________ (go).

Samantha ________ ________ _________ time to explain her story. (not/have).