COMPLEMENT (LINGUISTICS)

In grammar the term 'complement' is used with different meanings. The core meaning of complement is a word, phrase or clause which is necessary in a sentence to complete its meaning. We find complements which function as a sentence element (i.e. of equal status to subjects and objects) and complements which exist within sentence elements.

Contents

Subject complements

Object complements

Adverbials as complements

Verb objects

Subject complements

A subject complement tells more about the subject by means of the verb. In the examples below the sentence elements are (SUBJECT + VERB + COMPLEMENT)
''Mr Jenner is 'a management consultant'''. (a predicative nominal)
''She looks 'ill'.'' (a predicative adjective)

Object complements

An object complement tells us more about the object by means of the verb. In the examples below the sentence elements are (SUBJECT + VERB + OBJECT + COMPLEMENT). Object complements can often be removed leaving a well-formed sentence, thus the use of the term complement is slightly illogical.
''We elected him 'chairman.''' (a predicative nominal)
''We painted the house 'white'.'' (a predicative adjective)

Adverbials as complements

Adverbials, central to the meaning of a sentence, are usually adjuncts (i.e. they can be removed and a well-formed sentence remains). If, however, an adverbial is a necessary sentence element, then it is an adverbial complement. Adverbial complements often occur with a form of the copula ''be'' acting as a clause's main verb. The structure of the sentence below is (SUBJECT + VERB + ADVERBIAL COMPLEMENT)
''John is 'in the garden'''.

Verb objects

Some grammarians refer to verb objects as ''complements''.