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A subordinate clause, dependent clause, subclause, or embedded clause is a
clause In language, a clause is a constituent that comprises a semantic predicand (expressed or not) and a semantic predicate. A typical clause consists of a subject and a syntactic predicate, the latter typically a verb phrase composed of a verb w ...
that is embedded within a complex sentence. For instance, in the English sentence "I know that Bette is a dolphin", the clause "that Bette is a dolphin" occurs as the
complement A complement is something that completes something else. Complement may refer specifically to: The arts * Complement (music), an interval that, when added to another, spans an octave ** Aggregate complementation, the separation of pitch-class ...
of the verb "know" rather than as a freestanding sentence. Subtypes of dependent clauses include content clauses, relative clauses, and
adverbial clause An adverbial clause is a dependent clause that functions as an adverb. That is, the entire clause modifies a separate element within a sentence. As with all clauses, it contains a subject and predicate, though the subject as well as the (predicat ...
s.


Content clause

A content clause, also known as a "noun clause", provides content implied or commented upon by its main clause. It can be a subject, predicate nominative, direct object,
appositive Apposition is a grammatical construction in which two elements, normally noun phrases, are placed side by side so one element identifies the other in a different way. The two elements are said to be ''in apposition'', and one of the elements is c ...
, indirect object, or object of the preposition. Some of the English words that introduce content clauses are ''that, who'' (and formal ''whom''), ''whoever'' (and formal ''whomever''), ''whether, why, what, how, when'', and ''where''. Notice that some of these words also introduce relative and adverbial clauses. A clause is a content clause if a pronoun (''he, she, it,'' or ''they'') could be substituted for it. Examples: *I know ''who said that''. (I know them. The dependent clause serves as the object of the main-clause verb "know".) *''Whoever made that assertion'' is wrong. (They are wrong. The dependent clause serves as the subject of the main clause.) In English, in some instances the subordinator ''that'' can be omitted. Example 1: *I know ''that he is here.'' *I know ''he is here''. Example 2: *I think ''that it is pretty''. (less common) *I think ''it is pretty''. (more common)


Relative (adjectival) clause

In Indo-European languages, a relative clause, also called an adjectival clause or an adjective clause, meets three requirements: #Like all dependent clauses, it contains a verb (and also a subject unless it is a non-finite dependent clause). However, in a pro-drop language the subject may be a zero pronoun: the pronoun may not be explicitly included because its identity is conveyed by a verbal inflection. #It begins with a relative adverb 'when, where'', ''how'', or ''why'' in Englishor a relative pronoun 'who, whom, whose, that, what'' or ''which'' in English However, the English relative pronoun (other than ''what'') may be omitted and only implied if it plays the role of the object of the verb or object of a preposition in a restrictive clause; for example, ''He is the boy I saw'' is equivalent to ''He is the boy whom I saw'', and ''I saw the boy you are talking about'' is equivalent to the more formal ''I saw the boy about whom you are talking''. #The relative clause functions as an adjective, answering questions such as "what kind?", "how many?" or "which one?" The adjective clause in English will follow one of these patterns: *Relative Pronoun unctioning as Object of Verb + Subject + Verb :This is the ball ''that'' I was bouncing.'' *Relative Pronoun unctioning as Object of Verb(Omitted but Implied) + Subject + Verb :This is the ball I was bouncing. *Relative Adverb + Subject + Verb (possibly + Object of Verb) :That is the house ''where'' I grew up. :That is the house ''where'' I met her. *Relative Pronoun unctioning as Subject + Verb (possibly + Object of Verb) :That is the person ''who'' hiccuped. :That is the person ''who'' saw me. *Relative Pronoun unctioning as Object of Preposition+ Subject + Verb (possibly + Object of Verb) + Preposition :That is the person ''who(m)'' I was talking about. :That is the person ''who(m)'' I was telling you about. *Preposition + Relative Pronoun unctioning as Object of Preposition+ Subject + Verb (possibly + Object of Verb) :That is the person about ''whom'' I was talking. :That is the person about ''whom'' I was telling you. *Possessive Relative Pronoun + Noun unctioning as Subject+ Verb (possibly + Object of Verb) :That is the dog ''whose'' big brown eyes pleaded for another cookie. :That is the dog ''whose'' big brown eyes begged me for another cookie. *Possessive Relative Pronoun + Noun unctioning as Object of Verb+ Subject + Verb :That is the person ''whose'' car I saw. For a discussion of adjective clauses in languages other than English, see Relative clause#Examples.


Punctuation


English punctuation

The punctuation of an adjective clause depends on whether it is essential (restrictive) or nonessential (non-restrictive) and uses commas accordingly. Essential clauses are not set off with commas; nonessential clauses are. An adjective clause is essential if the information it contains is necessary to the meaning of the sentence: *The vegetables ''that people often leave uneaten'' are usually the most nutritious. The word "vegetables" is non-specific. Accordingly, for the reader to know which are being mentioned, one must have the information provided in the adjective clause (in italics). Because it restricts the meaning of "vegetable", the adjective clause is called a restrictive clause. It is essential to the meaning of the main clause and uses no commas (and so does not experience a pause when spoken). However, if the additional information does not help to identify more narrowly the identity of the noun antecedent but rather simply provides further information about it, the adjective clause is nonrestrictive and so requires commas (or a spoken pause) to separate it from the rest of the sentence: *Broccoli, ''which people often leave uneaten'', is very nutritious. Depending on context, a particular noun could be modified by either a restrictive or nonrestrictive adjective clause. For example, while "broccoli" is modified nonrestrictively in the preceding sentence, it is modified restrictively in the following. *The broccoli ''which (''or'' that) people leave uneaten'' is often nutritious.


Adverbial clause

"He saw Mary ''when he was in New York''" and "They studied hard ''because they had a test''" both contain adverbial clauses (in italics). Adverbial clauses express ''when, why, where, opposition'', and ''conditions'', and, as with all dependent clauses, they cannot stand alone. For example, ''When he was in New York'' is not a complete sentence; it needs to be completed by an independent clause, as in: *He went to the Guggenheim Museum ''when he was in New York.'' or equivalently *''When he was in New York'', he went to the Guggenheim Museum.


Sentence structure

A '' complex sentence'' contains an
independent clause An independent clause (or main clause) is a clause that can stand by itself as a '' simple sentence''. An independent clause contains a subject and a predicate and makes sense by itself. Independent clauses can be joined by using a semicolon or ...
and at least one dependent clause. A sentence with two or more independent clauses plus (one or more) dependent clauses is referred to as a '' compound-complex sentence''. (Every clause contains a subject and predicate.) Here are some English examples: My sister cried ''because she scraped her knee''. (complex sentence) *Subjects: My sister, she *Predicates: cried, scraped her knee *Subordinating conjunction: because ''When they told me'' ''(that) I won the contest'', I cried, but I didn't faint. (compound-complex sentence) *Subjects: they, I, I, I *Predicates: told me, won the contest, cried, didn't faint *Subordinating conjunctions: when, that (implied or understood) *Coordinating conjunction: but This sentence contains two dependent clauses: "When they told me", and "(that) I won the contest", the latter which serves as the object of the verb "told". The connecting word "that", if not explicitly included, is understood to implicitly precede "I won" and in either case functions as a subordinating conjunction. This sentence also includes two independent clauses, "I cried" and "I didn't faint", connected by the coordinating conjunction "but". The first dependent clause, together with its object (the second dependent clause), adverbially modifies the verbs of both main clauses.


Non-finite dependent clauses

Dependent clauses may be headed by an infinitive, gerund, or other non-finite verb form, which in linguistics is called deranked. For instance: * Sit up straight ''while singing.'' In these cases, the subject of the dependent clause may take a non- nominative form. An example is: * I want ''him to vanish.''


See also

*
Clause In language, a clause is a constituent that comprises a semantic predicand (expressed or not) and a semantic predicate. A typical clause consists of a subject and a syntactic predicate, the latter typically a verb phrase composed of a verb w ...
**
Independent clause An independent clause (or main clause) is a clause that can stand by itself as a '' simple sentence''. An independent clause contains a subject and a predicate and makes sense by itself. Independent clauses can be joined by using a semicolon or ...
** Relative clause * Dependent statement * Responsive predicate * Relative pronoun * Grammatical conjunction * Sentence **
Compound sentence In grammar, sentence and clause structure, commonly known as sentence composition, is the classification of sentences based on the number and kind of clauses in their syntactic structure. Such division is an element of traditional grammar. Typolog ...
** Simple sentence * Subjunctive mood *
Temporal clause (Latin) A temporal clause is an adverbial clause of time, that is to say, a clause which informs the reader about the time when the action of main verb of the sentence occurred. So in a sentence such as "after I had said this, he went out", the first clau ...


References

*


External links

* Owl Online Writing Lab Archive
Identifying Independent and Dependent Clauses
{{Authority control Clauses English grammar