Present+Perfect+and+Past+Perfect+Tenses

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The **present perfect** tense states an action that started in the past and is still going on. Add **has** or **have** before the past participle form of of the main verb. //(Haley has slept for 10 hours so far.)// The **past perfect** tense states an action that began and ended in the past. Add **had** before the past participle of the main verb. //(Erica had slept for 10 hours before her dog woke her up.)// The **future perfect** tense states an action that will begin in the future and end at a specific time. Add **will have** before the past participle form of the main verb. //(Devan will have slept for 14 hour by 8:00 a.m. tomorrow.)//