INGLES

Present  perfect.

The present perfect is used in the English language to narrate events that have already occurred in a time-specific or not, in the past but still have a relevance in the present.

Corresponds in structure with the present perfect in Spanish, ie, the verb is constructed with the auxiliary verb have or if you have third-person singular (he, she, it), plus the participle of the verb: subject + verb + haveohas past participle, but not always in use: I have been married for two years. (I've been married two years.) .1

In the sense of the previous example, it is especially important to use to connect the past with the present, and even future. Hence, frequent use adverbs of time as for, since, etc.

 con este link te puedes ayudar mas si lo lo as entendido aun:http://www.theyellowpencil.com/gpresenteperfecto.html