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past participle
verb form created by adding -ed (or occasionally -d, -n, -t)
Present perfect tense
shows action that started in the past/continues in the present
past perfect tense
shows that something happened before another action in the past
Present perfect continuous
shows something that began in the past and continues up to now; shows repeating action
What is the structure for present perfect tense?
have/had + past participle
What is the structure for the past perfect tense?
had + past participle
What is the structure for the present perfect continuous tense?
have/has + been + verb-ing