Form
The present perfet is form with have or has and the participle
The participle of the irregular verbs are form with ed the infinitive
Afirmative have
Subject + have/has + participle of the verb+ complement
Negative haven¨t or have not
Subject + have/ has + not + Participle of the verb + complements
interrogative have I
Have/has + subject + participle + complements.
since :desde
have I,you,we,they ever,never:nunca,siempre
alredy,yet and still
has he,she,it
credits
present perfet
wikipedia
my book
