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Couple found slain; Murder-suicide suspected.
The problem, unless dealt with, will only get worse.
A person struck by lightning has a high chance of survival.
With get as the auxiliary
While the ordinary passive construction uses the auxiliary be, the same effect can sometimes be achieved using get in its place: Jamie got hit with the ball.
This use of get is fairly restricted. First of all, it is fairly colloquial; be is used in news reports, formal writing, and so on. Second of all, it typically only forms eventive passives of eventive verbs. Third of all, it is most often (but not necessarily) used with semantically negative verbs; for example, the phrase get shot is much more common than the phrase get praised.
Ergative verbs
An ergative verb is a verb that may be either transitive or intransitive, and whose subject when it is intransitive plays the same semantic role as its direct object when it is transitive. For example, fly is an ergative verb, such that the following sentences are roughly synonymous:
The airplane flew.
The airplane was flown.
[Someone] flew the airplane.
One major difference is that the intransitive construction does not permit an agent to be mentioned, and indeed can imply that no agent is present, that the subject is performing the action on itself. For this reason, the intransitive construction of an ergative verb is often said to be in a middle voice, between active and passive, or in a mediopassive voice, between active and passive but closer to passive.
Reflexive verbs
A reflexive verb is a transitive verb one of whose objects is a reflexive pronoun (myself, yourself, etc.) referring back to its subject. In some languages, reflexive verbs are a special class of verbs with special semantics and syntax, but in English, they typically represent ordinary uses of transitive verbs. For example, with the verb see:
He sees her as a writer.
She sees herself as a writer.
Nonetheless, sometimes English reflexive verbs have a passive sense, expressing an agentless action. Consider the verb solve, as in the following sentences:
He solved the problem.
The problem solved itself.
One could not say that the problem truly solved anything; rather, what is meant is that the problem was solved without anyone solving it.
Gerunds and nominalization
Gerunds and nominalized verbs (nouns derived from verbs and referring to the actions or states expressed by them), unlike finite verbs, do not require explicit subjects. This allows an object to be expressed while omitting a subject. For example:
The proof of the pudding is in the eating.
Generating electricity typically requires a magnet and a solenoid.
Usage and style
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Many English educators and usage guides, such as The Elements of Style, discourage the use or overuse of the passive voice, seeing it as unnecessarily verbose (when the agent is included in a by phrase), or as obscure and vague (when it is not). This perception is exacerbated by the occasional intentional use of the passive voice to avoid assigning blame, such as by replacing «I made mistakes» with «Mistakes were made.»
Nonetheless, the passive voice is frequently used for a number of other reasons:
Certain verbs frequently appear in the passive – for example, be born, be smitten, and be had are all more common in certain senses than their active counterparts – though in many cases these might be better analyzed as adjectival passives (see above) than as true passives.
The passive voice serves to emphasize the patient; if the agent is comparatively unimportant to the point, or if the agent is obvious from context, then the passive voice might serve a rhetorical purpose.
Since in English, the subject nearly always comes before the object in a sentence, using the passive voice (i.e., promoting the patient from object to subject) moves the patient earlier in the sentence. If the patient has been mentioned in a previous sentence, this can serve as a marker of the connection between the two sentences.
Scientific writing has traditionally used the passive voice rather than mentioning a researcher in every sentence; this may be changing, however.
In journalistic writing and law, two areas where it can be essential to state only established facts, use of the passive voice allows uncertain agents to be omitted; again, however, use of the active voice is on the rise, with other mechanisms being used to avoid insupportable claims.
2.4 The category of mood
In linguistics, many grammars have the concept of grammatical mood (or mode), which describes the relationship of a verb with reality and intent. Many languages express distinctions of mood through morphology, by changing (inflecting) the form of the verb.
Because modern English does not have all of the moods described below, and has a very simplified system of verb inflection as well, it is not straightforward to explain the moods in English. (The English moods are indicative, subjunctive, and imperative). Note, too, that the exact sense of each mood differs from language to language.
Grammatical mood per se is not the same thing as grammatical tense or grammatical aspect, although these concepts are conflated to some degree in many languages, including English and most other modern Indo-European languages, insofar as the same word patterns are used to express more than one of these concepts at the same time.
Currently identified moods include conditional, imperative, indicative, injunctive, negative, optative, potential, subjunctive, and more. Infinitive is a category apart from all these finite forms, and so are gerunds and participles. Some Uralic Samoyedic languages have over ten moods; Nenets has as many as sixteen. The original Indo-European inventory of moods was indicative, subjunctive, optative, and imperative. Not every Indo-European language has each of these moods, but the most conservative ones such as Avestan, Ancient Greek, and Sanskrit have them all.
It should be noted that not all of the moods listed below are clearly conceptually distinct. Individual terminology varies from language to language, and the coverage of (e.g.) the «conditional» mood in one language may largely overlap with that of the «hypothetical» or «potential» mood in another. Even when two different moods exist in the same language, their respective usages may blur, or may be defined by syntactic rather than semantic criteria. For example, the subjunctive and optative moods in Ancient Greek alternate syntactically in many subordinate clauses, depending on the tense of the main verb. The usage of the indicative, subjunctive and jussive moods in Classical Arabic is almost completely controlled by syntactic context; the only possible alternation in the same context is between indicative and jussive following the negative particle lā.
Classification
Realis
Realis moods are a category of grammatical moods which indicate that something is actually the case, or actually not the case. The most common realis mood is the indicative mood or the declarative mood.
Declarative
The declarative mood indicates that the statement is true, without any qualifications being made. It is in many languages equivalent to the indicative mood, although sometimes distinctions between them are drawn. It is closely related with the inferential mood (see below).
Generic
The generic mood is used to make generalizations about a particular class of things, e.g. in «Rabbits are fast», one is speaking about rabbits in general, rather than about particular fast rabbits. English has no means of morphologically distinguishing generic mood from indicative mood, however the distinction can easily be understood in context by surrounding words. Compare, for example: rabbits are fast, versus, the rabbits are fast. Use of the definite article the implies specific, particular rabbits, whereas omitting it implies the generic mood simply by default.6
Ancient Greek had a species of generic mood, the so-called gnomic utterance, marked by the aorist indicative (normally reserved for statements about the past). It was used especially to express philosophical truths about the world.
Indicative (evidential)
The indicative mood is used for factual statements and positive beliefs. All intentions that a particular language does not categorize as another mood are classified as indicative. In English, questions are considered indicative. It is the most commonly used mood and is found in all languages. Example: «Paul is reading a book» or «John reads books».
Negative
The negative mood expresses a negated action. In many languages, this is not a distinct mood; negation is expressed by adding a particle:
Before the verb phrase, as in Spanish No está en casa;
Or after it, as in archaic and dialectal English Thou remembrest not or Dutch Ik zie hem niet, or in modern English, I think not;
Or both, as in French Je ne sais pas or Afrikaans Hy kan nie Afrikaans praat nie.
Standard English usually adds the auxiliary verb do, and then adds not after it: «I did not go there». In these instances, «do» is known as a dummy auxiliary, because of its zero semantic content.
In Indo-European languages, it is not customary to speak of a negative mood, since in these languages negation is originally a grammatical particle that can be applied to a verb in any of these moods. Nevertheless, in some, like Welsh, verbs have special inflections to be used in negative clauses.
In other language families, the negative may count as a separate mood. An example is Japanese, which conjugates verbs in the negative after adding the suffix – nai (indicating negation), e.g. tabeta («ate») and tabenakatta («did not eat»).
It could be argued that Modern English has joined the ranks of these languages, since negation in the indicative mood requires the use of an auxiliary verb and a distinct syntax in most cases. Contrast, for instance, «He sings» → «He doesn't sing» (where the auxiliary to do has to be supplied, inflected to does, and the clitic form of not suffixed to derive the negative from «He sings») with Il chante → Il ne chante pas; French adds the (discontinuous) negative particle ne… pas, without changing the form of the verb.
Irrealis
Irrealis moods are the set of grammatical moods that indicate that a certain situation or action is not known to have happened as the speaker is talking.
Cohortative
The cohortative mood (alternatively, hortatory) is used to express plea, insistence, imploring, self-encouragement, wish, desire, intent, command, purpose or consequence. It does not exist in English, but phrases such as «let us» are often used to denote it. In Latin, it is interchangeable with the jussive.
Conditional
The conditional mood is used to speak of an event whose realization is dependent on a certain condition, particularly, but not exclusively, in conditional sentences. In Modern English, it is a periphrastic construction, with the form would + infinitive, e.g. I would buy. In other languages, such as Spanish or French, verbs have a specific conditional inflection. Thus, the conditional version of «John eats if he is hungry» is:
John would eat if he were hungry, in English;
Jean mangerait s'il avait faim, in French;
Juan comería si tuviera hambre, in Spanish.
In the Romance languages, the conditional form is used primarily in the apodosis (main clause) of conditional clauses, and also in a few set phrases where it expresses courtesy or doubt. The main verb in the protasis (dependent clause) is either in the subjunctive or in the indicative mood.
This is not a universal trait; in Finnish, for example, the conditional mood is used both in the apodosis and the protasis. An example is the sentence «I would buy a house if I earned a lot of money», where in Finnish both clauses have the conditional marker – isi– : Ostaisin talon, jos ansaitsisin paljon rahaa.
In English, too, the would + infinitive construct can be employed in main clauses, with a subjunctive sense: «If you would only tell me what's troubling you, I might be able to help».
Imperative
The imperative mood expresses direct commands, requests, and prohibitions. In many circumstances, using the imperative mood may sound blunt or even rude, so it is often used with care. Example: «Paul, do your homework now». An imperative is used to tell someone to do something without argument.
Many languages, including English, use the bare verb stem to form the imperative. Other languages, such as Seri, however, use special imperative forms.
In English, second-person is implied by the imperative except when first-person plural is specified, as in «Let's go» («Let us go»).
Interrogative
The interrogative mood is used for asking questions. Most languages do not have a special mood for asking questions, but Welsh and Nenets do.
Jussive