The present perfect is a compound tense that is formed with a modal verb and the perfect participle.

pronoun modal verb perfect participle   I have talked   you have talked   he has talked   we have talked   you have talked   they have talked

Actually it works the same in other European languages (if you care to know):

Spanish   Yo he venido. = I have come. Yo he comprado una casa. = I have bought a house.

Italian   Io sono venuto. = I have come Io ho comprato una casa. = I have bought a house.

French   Je suis venu. = I have come. J´ai acheté une maison. = I have bought a house.

The last two examples have one thing more in common with German. They use different modal verbs for different verb types. Participles of intransitive verbs (the ones that don't need a direct object) are formed with the verb to be. Participles of transitive verbs are formed with the verb to have.