The syntactic sentenceFormal definitions usually refer to the structural independence of the sentence: that it is not included in a lager structural unit by such devices as coordination and subordination. However, dependence is relative: what are generally recognized as sentences may be dependent to some extent on other sentences through such devices as pronoun substitution and connective ADVERBIALS: therefore, however, yet. Elliptical sentences such as Tomorrow (in answer to When is your birthday?) are clearly dependent in some sense on linguistic context. There are also problems in deciding the status of formulaic utterances such as Yes or Good morning, which in dialogue are complete in themselves. Formal definitions may also refer to the internal structures of sentences. Indeed, it is possible to recognize as canonical sentences those that conform in their structure to the normal clause patterns, such as subject-verb-direct object. Other constructions would then be considered irregular or minor, and some (such as Yes) perhaps not sentences at all.
The orthographic sentenceIn written language, sentence status is signalled by punctuation, primarily through the PERIOD (especially AmE) or full stop (especially BrE), but the orthographic sentence is not necessarily identical with the syntactic sentence: CLAUSES separated by SEMICOLONS or COLONS might well be analysed as independent sentences, the punctuation reflecting the writer's feeling that the sentences to linked are closer semantically than the surrounding sentences. In addition, in the prose of publicists and advertisers, traditional conventions for the organization of written sentences are routinely abandoned, in order to highlight certain points:
Have a little pick-me-up before you get back to work. Iberia's Business Class always welcomes you with a glass of sherry. A taste of Spanish sunshine to whet your appetite for the delicious meal ahead. And afterwards relax and take advantage of our unique, multilingual, on-board library. Efficient and professional but warm and hospitable. That's how we think business should be (advertisement, 1990).
The phonological sentenceContemporary linguists tend not to worry over the definition of a sentence. They assume that they can recognize sentences, implicitly relying on their familiarity with their orthographic forms. The spoken language, however, does not signal sentence boundaries. The syntax of speech, particularly in spontaneous conversation, differs considerably from the regularities of the written (particularly printed) language in ways that have yet to be fully investigated. Everyday conversation exhibits abundant hesitations, shifts in sentence construction, apparently incomplete structures, and interconnections that are odd by the norms of the written language. Most grammarians focus on structures in the written language (and their analogues in more or less formal speech) for the data they use in constructing their grammars, and if they turn their attention at all to samples of speech tend to derive spoken structures from what they consider to be fuller forms normal in written texts. What constitutes a sentence in the language should be (but does not appear to be) of particular concern to generative grammarians who view the goal of their grammar as accounting for all and only the sentences of the language.
Sentence structuresIf the sentence is to constitute a grammatical unit for the language as a whole, then the orthographic sentence cannot serve as that unit: speech signals do not correspond to sentence punctuation, and punctuation only crudely signals some elements of speech, such as possible points for pausing or changing one's tone. Instead, reference can be made to the relative independence of the unit and its internal structure. A sentence may be viewed as a clause complex, in which the parts are clauses linked to each other by coordination and subordination. From this viewpoint, the traditional SIMPLE SENTENCE is indeed simple, because it consists of only one clause, as in: The governor of the prison negotiated with the prisoners throughout the day. A COMPOUND SENTENCE involves the coordination of two or more main clauses (each of which could constitute a simple sentence), linked by the coordinators and, or, but, as in: The governor of the prison negotiated with the prisoners throughout the day and talks were continued into the night. A COMPLEX SENTENCE consists of one main clause within which there are one or more subordinate clauses: The governor of the prison negotiated with the prisoners after police had seized control of the kitchen and food-store area. The subordinate clause, here introduced by the subordinator after, can be moved to the front of the sentence, a typical property of subordinate clauses.
Further complexities are quite usual. A COMPOUND-COMPLEX SENTENCE resembles the simple sentence in having more than one main clause, but in addition one or more of the main clauses contains one or more subordinate clauses: A police officer said that the prison authorities could not confirm that there were bodies inside the prison, but he believed that there had been some deaths. Here, the two main clauses are coordinated by but, the first main clause has a that-clause within which is embedded another that-clause, and the second main clause also contains a that-clause. It is further possible to recognize a complex-compound sentence (though the term is not often used), in which the one main clause contains two or more subordinate clauses that are coordinated: The Home Secretary said that nine prisoners had been forcibly injected with drugs and that eight others had taken drugs voluntarily. In this example, the two subordinate that-clauses are coordinated by and. The subordinate clause may be embedded in a PHRASE rather than directly in another clause, as in this example of a relative clause (introduced by who) that is embedded in a noun phrase: Twelve prison officers who received minor injuries during the riot have all been discharged from hospital.
All the examples of subordinate clauses given above have been finite clauses, but subordination may be effected through non-finite clauses and verbless clauses. In the next example, two coordinated participle clauses (which follow the comma) are subordinate to the main clause in this complex sentence: The rioters have destroyed most of the ten wings of the prison, systematically smashing cells and setting fire to buildings. In the example that follows, the if-clause is verbless: If possible, prisoners will be moved to other prisons.
Constituents of clausesThis structured account of sentences assumes the recognition of clauses. A clause consists of central and peripheral constituents, the first usually obligatory, the second optional. The central constituents are the subject (though generally omitted in imperative sentences) and the verb, as in Nobody moved. Other central constituents are complements of the verb: that is, elements that complete its meaning, such as the direct object my typewriter in Somebody has taken my typewriter, the indirect object me in Derek gave me some books, the subject complement hungry in Jane is hungry, the object complement strong in I like my tea strong, the adverbial complement in the garage in The car is in the garage and in I put the car in the garage. The peripheral or marginal constituents are mainly adverbials such as incidentally, also, and last week in Incidentally, Derek also gave me some books last week, and vocatives such as Natalie in I like my tea strong, Natalie.
Irregular structuresSome constructions are irregular in some respect, but are generally considered sentences or (if attached to a sentence) parts of sentences: (1) Certain types of subordinate clauses constitute independent exclamations: That we should come to this! To think that I once helped him! If it isn't my old friend Jeremy! If only you had listened to me! (2) Questions in which the phrases or subordinate clauses are introduced by interrogative words: How about a kiss? Why all the fuss? What if they don't come? How come you're not ready yet? (3) Such headings as How to get help in an emergency; Where you should eat in Paris. (4) Elliptical constructions such as Serves you right and Never fails, does it?, and elements of dialogue such as A: Where are you? B: In the kitchen. (5) Problematic sequences that cannot easily be analysed into clausal constituents appear in such contexts as labels, titles, warnings, and greetings: Baked beans; The Department of English; Good morning; The police!; Thanks; Yes. Conversations often contain such sequences as That one. The big one. No, the one over there. Higher up. Yes. Beside the green jug, which might as easily be written That one—the big one—no—the one over there—higher up—yes—beside the green jug, orthographically sidestepping the problem of deciding the status of the phrases in question. Such uncertain sequences are often referred to as sentence fragments.
Functional and syntactic categoriesSentences were categorized above by degree of internal complexity: simple, compound, complex, compound-complex, complex-compound. They are also commonly classified according to dominant function in discourse, as declarative, interrogative, imperative, and exclamatory. These functions are reflected in the four corresponding sentence types statement, question, directive (or command), and exclamation. In addition, sentences can be classified according to syntactic features that affect the sentence as a whole: mood (indicative, imperative, subjunctive), voice (active, passive), and polarity (positive, negative). Finally, they can be classified by the patterns of the central or kernel constituents that they exhibit: for example, Subject–Verb–Direct Object (SVDO); Subject–Verb–Subject Complement (SVSC).
See COMMA, COMPARATIVE SENTENCE, COMPLEMENT, EXISTENTIAL SENTENCE, OBJECT, PARTICIPLE, PART OF SPEECH, PERIODIC SENTENCE, PREDICATE, PUNCTUATION, SENTENCE WORD, STRESS, STYLE, SUBJECT, TAG, VERB, VERBLESS SENTENCE, VOICE, WRITING.
sen·tence / ˈsentns/ • n. 1. a set of words that is complete in itself, typically containing a subject and predicate, conveying a statement, question, exclamation, or command, and consisting of a main clause and sometimes one or more subordinate clauses. ∎ Logic a series of signs or symbols expressing a proposition in an artificial or logical language.2. the punishment assigned to a defendant found guilty by a court: her husband is serving a three-year sentence for fraud. ∎ the punishment fixed by law for a particular offense: slander of an official carried an eight-year prison sentence.• v. [tr.] declare the punishment decided for (an offender): ten army officers were sentenced to death.PHRASES: under sentence of having been condemned to: he was under sentence of death.ORIGIN: Middle English (in the senses ‘way of thinking, opinion,’ ‘court's declaration of punishment,’ and ‘gist (of a piece of writing)’): via Old French from Latin sententia ‘opinion,’ from sentire ‘feel, be of the opinion.’
So vb. XIV. — (O)F. sentencier. sententious †full of meaning XV; aphoristic XVI. — L. sententiōsus. sentient capable of feeling. XVII.