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The passive voice is a specific grammatical construction. The essential components, in English, are a form of the stative verb be (or sometimes get [4]) and the past participle of the verb denoting the action.
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]
Passive voice can be expressed in combination together with tenses, aspects and moods, by means of appropriate marking of the auxiliary (which for this purpose is not a stative verb, i.e. it has progressive forms available). For example: This room is tidied regularly. (simple present passive) It had already been accepted. (past perfect passive)
The passive voice in English is normally expressed with a form of the copula verb be (or sometimes get) together with the past participle of the main verb. In this context be is not a stative verb, so it may occur in progressive forms.
An auxiliary verb (abbreviated aux) is a verb that adds functional or grammatical meaning to the clause in which it occurs, so as to express tense, aspect, modality, voice, emphasis, etc. Auxiliary verbs usually accompany an infinitive verb or a participle, which respectively provide the main semantic content of the clause. [1]
The word "perfect" in this sense means "completed"; it contrasts with the "imperfect", which denotes uncompleted actions or states. In English grammar, the pluperfect (e.g. "had written") is now usually called the past perfect, since it combines past tense with perfect aspect. (The same term is sometimes used in relation to the grammar of other ...
The voice [13] of a verb expresses whether the subject of the verb is performing the action of the verb or whether the action is being performed on the subject. The two most common voices are the active voice (as in "I saw the car") and the passive voice (as in "The car was seen by me" or simply "The car was seen").
The perfect aspect (or perfect progressive) can also be combined with marking for the passive voice. Perfect passive forms can be constructed by replacing the participle of the main verb with the corresponding participle of be followed by the past participle of the main verb: it has been eaten; it will have been eaten; it has been being eaten.