The present perfect tense connects past actions to the present1 formed using 2have3 or 4has5 plus the past participle of the verb.

Apuntes

The present perfect tense connects past actions to the present, formed using "have" or "has" plus the past participle of the verb. Definition and Structure The present perfect tense is used to describe actions that occurred at an unspecified time before now. It emphasizes the connection between the past and the present. The structure is as follows: Affirmative: Subject + have/has + past participle Example: I have visited Paris. Example: She has finished her homework. Negative: Subject + have/has + not + past participle Example: I have not seen that movie yet. Example: He has not called us back. Interrogative: Have/Has + subject + past participle? Example: Have you read that book? Example: Has she moved to a new house?