We use the perfect progressive aspect to talk about an action that was once ongoing, but has since completed, like 'I had been waiting for twenty minutes.'

Concepts

verb tenses

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Additional Tags

khan academy, perfect progressive aspect, future perfect, past perfect, present perfect

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Classroom Considerations

• Knovation Readability Score: 5 (1 low difficulty, 5 high difficulty)
• The intended use for this resource is Instructional