The perfect verb tenses show that an action was completed before a certain time. They consist of the present perfect, the past perfect, and the future perfect, and they are formed by placing a conjugation of the auxiliary verb to have before the past participle of the main verb.
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Types and examples:
- Present Perfect (have/has + past participle): I have finished my homework.
- Past Perfect (had + past participle): She had left before I arrived.
- Future Perfect (will have + past participle): They will have graduated by June.
