Pretéritoperfecto = Haber + participio. Firstly, here is a list of the present conjugations of haber: Next, you need to form a past participle for the verb you want to use in this tense. To form past participles for regular ar verbs, you need to remove the ar and replace it with an ado.
FINALEPresent Perfect Tense - View presentation slides online.
Thepresent perfect tense is generally used to represent an action which has been completed within a period of time that extends up to and includes the present. The present perfect tense cannot be used with a point of time in the past. However, time adverbs that refer to a period of time extending up to the present may be mentioned.
Fast Money.
time signal present perfect tense