Perfect tences

INTRODUCTION: WHAT ARE THE PERFECT TENSES?  

* Perfect tenses are compound (two-word) verb conjugations that describe an event as completed as of a certain point in the present past or future.* Spanish perfect tenses correspond fairly consistently to English (I, you..., etc.) has/have talked, had talked, will have talked,
* would have talked, etc.

* They consist ofa conjugated form of the auxiliary verb haber an invariable past participle (always ending in -o).
* Their uses and meanings correspond largely with their counterparts in English; see examplesbelow.
* There are four non-subjunctive perfect tense conjugations, and two in the subjunctive.

PERFECT TENSES: THE PRESENT PERFECT (INDICATIVE) (" has/have _____ed")

Events completed as ofthe present, often referring to completion or occurrence within the present day, month, year, etc., or ever (in one's lifetime, in history, etc.)

Conjugation: Present of haber + pp*
he
Has
hehemos } + past participle
habéis
Han


Examples  
* He probado ese plato una vez.
* I've tried that dish once.
* ¿Has estado alguna vez en París?* Have you ever been in Paris?
* Vimos a Tomás ayer, pero no lo hemos visto hoy.
* We saw Tomás yesterday, but we haven't seen him today.
* Nunca ha ocurrido un accidente así.* An accident like that has never happened.
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PERFECT TENSES: PLUPERFECT (INDICATIVE) (" had _____ed Events that were completed as of a point in past.") 

Conjugation: Imperfect ofhaber + pp*
había
habías
había
habíamos } + past participle*
habíamos
habíais
habían
       

Examples
* Antes del mes pasado, yo nunca había comido en ese restaurante.* Before last month, I had never eaten in that restaurant.
* Fuimos al estadio para ver un partido ayer. Antes, sólo habíamos visto los partidos en la tele.
* We went to the...