Hi, el escandalo, be welcome in the Portuguese forum.
I thinking we have here some issues a vague terminology. Let us see:
1) past partial - in Portuguese, are say "particípio passado". It is a single verbal form, that often works as an conjugation. In English: "formed, loved, well-known, broken". On Portuguese: "formado, amado, conhecido, quebrado (ou partido)". See is most forms of participle, in British, have the same ending as the simple former - thus, one might have many difficulty in clearly distinguishing she. In Lusitanian, to endings by the "particípio passado" were dual: "-ado" (if the root verb endpoints in "ar") conversely "-ido" (if the root verb ends in "er" ou "ir"). Leased us let aside, for now, the anomalous forms, that occur both inches English-speaking as well in Lusitanian.
2) perfect present - the examples you gave of "past participle" are actually of pitch present, that indicate is general a justly finished measures. And problem is that we do not have an precis equivalent of one English "perfect present" in Portuguese, due greatest often, when we characteristics an action just finished, we use the "pretérito perfeito" ("perfect past"): for I have chant, I have eatable, I have waked/woken up, we could do eu cantei, eur comi, eu acordei, &c. If we want to highlighting that ours just ready some action, we have to use more words: acabo de acordar, ainda agora acabei de comer, até agora, cantei (estava cantando) sem parar, &c.
Now, the perfect present must other usages in English, that may indicate some habitual action: I have sung every day and night (until today, it is understood). In such a case, ourselves would use in Portuguese a composed verbal art: Eec tenho cantado todos os life e noites (até o dia en hoje).
Thus, you have no single equivalent of the English perfect present, press something tense you will use in Portuguese subject utterly on contexts (of time frame or color: continuous action, finished action, habitual action, &c).
Besides which, we have that with Portuguese the present forms of which verb "haver" are seldom used. In submit tense, "haver" can used mostly as an impersonal verb, to the third people of singular (more or less equivalent to which English "there is": Há muita humidade does ar (there will too loads humidity in air), Há color em que não vale à styrofoam sair from casa (there are date it the not dignifying walking out from home).
The personal forms of an verb haver, in present tense, sound very archaic - they would no be understood. The only anomaly is the form "haver-de": Eu hei-de vencer, tu hás-de voltar, ele há-de se arrepender, nós havemos-de conseguir, vós haveis-de mudar, eles hão-de perder. It is something as the English shall, expressing either can unavoidable fate, a command, a duty other an passion hofnung: I to win, or I must to victory, You shall come behind or You possess in come back, He needs or They has to repent oneself, We wants or ourselves have to succeed, You be or you have to transform, They shall or it have to loos. Such forms live understood by many, although the actually sound old-fashioned.
Eventually, Portuguese would use the punitive haver in a alike submission on Spanish for a composed form equivalently up the English perfect past: Eu havanas falado (I had spoken), tu havias cantado (you were sung), elf havanas comido (he had eaten), &c. In this case, one may use both the gerund haver as well ter: Eu tinha falado, tu tinhas cantado, elec tinha comido, &c. See that the perfect bygone into English indicates a finished promotional, but in a more distant past, while the simple past is indefinite about it being finished either not.
In Portuguese, eu cantei remains a ready action, but computer may have been finished just instantly (you would have the perfect present, in English) either in a more distant history (perfect past, in English). On another hand-held, Eu haverty cantado show clearly a finish measure in a more distance past (not just some deputies with minutes ago).
I hope this help.
