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A passive voice construction is a grammatical voice construction that is found in many languages. [1] In a clause with passive voice, the grammatical subject expresses the theme or patient of the main verb – that is, the person or thing that undergoes the action or has its state changed. [2]
The present perfect is a grammatical combination of the present tense and perfect aspect that is used to express a past event that has present consequences. [1] The term is used particularly in the context of English grammar to refer to forms like "I have finished".
In the active voice only two verbs (τεθνήξω (tethnḗxō) "I will be dead" and ἑστήξω (hestḗxō) "I will be standing") have a separate form for the future perfect tense, [93] though a compound ("periphrastic") tense can be made with a perfect participle, e.g ἐγνωκὼς ἔσται (egnōkṑs éstai) [94] "he is going to ...
The English passive voice typically involves forms of the verbs to be or to get followed by a passive participle as the subject complement—sometimes referred to as a passive verb. [1] English allows a number of additional passive constructions that are not possible in many other languages with analogous passive formations to the above.
The present active is vi ser (we see); the mediopassive (commonly called passive) form is historically derived thus: de ser sig ("they see themselves") → de ses ("they are seen" or "they see themselves/see each other"). The third person forms have since been generalized by analogy to the first and second person, and as the future progressive ...
The usual passive voice is the se pasiva, in which the verb is conjugated in the active voice, but preceded by the se particle: La puerta se abre. La puerta se cierra. Estar is used to form what might be termed a static passive voice (not regarded as a passive voice in traditional Spanish grammar; it describes a state that is the result of an ...
Conversely, Latin also has some verbs that are active in form but passive in meaning. fio ' I am made/done ' was used as the passive of facio ' I do/make '. In the perfect forms (perfect, pluperfect, and future perfect), this was a compound verb just like the passive voice of regular verbs (factus sum ' I have been done ').
The present perfect may also be used with future reference, instead of the future perfect, in those dependent clauses where future occurrence is denoted by present tense (see § Dependent clauses below). For example: When you have written it, show it to me. For the possibility of a present perfect subjunctive, see English subjunctive.