Passive voice in the context of "Non-finite verb"

In grammar, the voice (or diathesis) of a verb describes the relationship between the action (or state) that the verb expresses and the participants identified by its arguments (subject, object, etc.). When the subject is the agent or doer of the action, the verb is in the active voice. When the subject is the patient, target or undergoer of the action, the verb is said to be in the passive voice. When the subject both performs and receives the action expressed by the verb, the verb is in the middle voice.

The following pair of examples illustrates the contrast between active and passive voice in English. In sentence (1), the verb form ate is in the active voice, but in sentence (2), the verb form was eaten is in the passive voice. Independent of voice, the cat is the Agent (the doer) of the action of eating in both sentences.

In linguistics, transformational grammar (TG) or transformational-generative grammar (TGG) was the earliest model of grammar proposed within the research tradition of generative grammar. Like current generative theories, it treated grammar as a system of formal rules that generate all and only grammatical sentences of a given language. What was distinctive about transformational grammar was that it posited transformation rules that mapped a sentence's deep structure to its pronounced form. For example, in many variants of transformational grammar, the English active voice sentence "Emma saw Daisy" and its passive counterpart "Daisy was seen by Emma" share a common deep structure generated by phrase structure rules, differing only in that the latter's structure is modified by a passivization transformation rule.

Scientific writing is about science, with the implication that the writing is done by scientists and for an audience that primarily includes peers—those with sufficient expertise to follow in detail. (The similar term "science writing" instead refers to writing about a scientific topic for a general audience; this could be by scientists and/or journalists, for example.) Scientific writing is a specialized form of technical writing, and a prominent genre of it involves reporting about scientific studies such as in articles for a scientific journal. Other scientific writing genres include writing literature-review articles (also typically for scientific journals), which summarize the existing state of a given aspect of a scientific field, and writing grant proposals, which are a common means of obtaining funding to support scientific research. Scientific writing is more likely to focus on the pure sciences compared to other aspects of technical communication that are more applied, although there is overlap. There is not one specific style for citations and references in scientific writing. Whether one is submitting a grant proposal, literature review articles, or submitting an article into a paper, the citation system that must be used will depend on the publication they plan to submit to.

English-language scientific writing originated in the 14th century, with the language later becoming the dominant medium for the field. Style conventions for scientific writing vary, with different focuses by different style guides on the use of passive versus active voice, personal pronoun use, and article sectioning. Much scientific writing is focused on scientific reports, traditionally structured as an abstract, introduction, methods, results, conclusions, and acknowledgments. However, one of the founders of the Royal Academy, Thomas Sprat, also saw connections between scientific writing and writing in the humanities.

Arabic grammar (Arabic: النَّحْوُ العَرَبِيُّ) is the grammar of the Arabic language. Arabic is a Semitic language and its grammar has many similarities with the grammar of other Semitic languages. Classical Arabic and Modern Standard Arabic have largely the same grammar; colloquial spoken varieties of Arabic can vary in different ways.

The largest differences between classical and colloquial Arabic are the loss of morphological markings of grammatical case; changes in word order, an overall shift towards a more analytic morphosyntax, the loss of the previous system of grammatical mood, along with the evolution of a new system; the loss of the inflected passive voice, except in a few relict varieties; restriction in the use of the dual number and (for most varieties) the loss of the feminine plural. Many Arabic dialects, Maghrebi Arabic in particular, also have significant vowel shifts and unusual consonant clusters. Unlike in other dialects, first person singular verbs in Maghrebi Arabic begin with a n- (ن). This phenomenon can also be found in the Maltese language, which itself emerged from Sicilian Arabic.

Ancient Greek verbs have four moods (indicative, imperative, subjunctive and optative), three voices (active, middle and passive), as well as three persons (first, second and third) and three numbers (singular, dual and plural).

• In the indicative mood there are seven tenses: present, imperfect, future, aorist (the equivalent of past simple), perfect, pluperfect, and future perfect. (The last two, especially the future perfect, are rarely used).
• In the subjunctive and imperative mood, however, there are only three tenses (present, aorist, and perfect).
• The optative mood, infinitives and participles are found in four tenses (present, aorist, perfect, and future) and all three voices.

The distinction of the "tenses" in moods other than the indicative is predominantly one of aspect rather than time.

In linguistic typology, object–verb–subject (OVS) or object–verb–agent (OVA) is a rare permutation of word order. OVS denotes the sequence object–verb–subject in unmarked expressions: Apples ate Sam, Thorns have roses. The passive voice in English may appear to be in the OVS order, but that is not an accurate description. In an active voice sentence like Sam ate the apples, the grammatical subject, Sam, is the agent and is acting on the patient, the apples, which are the object of the verb, ate. In the passive voice, The apples were eaten by Sam, the order is reversed and so that patient is followed by the verb and then the agent. However, the apples become the subject of the verb, were eaten, which is modified by the prepositional phrase, by Sam, which expresses the agent, and so the usual subject–verb–(object) order is maintained.

OVS sentences in English may be parsed if relating an adjective to a noun ("cold is Alaska") although cold is a predicative adjective, not an object. Rare examples of valid if idiomatic English use of OVS typology are the poetic hyperbaton "Answer gave he none" and "What say you?" Those examples are, however, highly unusual and not typical of modern spoken English.