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Some verbs with an object complement need “as” before it and some do not
“AS” AFTER THE OBJECT OF A VERB
As is quite commonly used before a noun-like or adjective-like expression in order to link it with a preceding verb and its object:
(a) Local people see tourists AS a source of income.
Here, as is linking the noun-like phrase a source of income with the verb see (= consider) and its object tourists. The phrase is describing tourists and could be replaced by an adjective, e.g. generous.
In grammar, a noun or adjective linked as above with a preceding verb + object is called an “object complement” (see 220. Features of Complements, #1). The link must be with the verb as well as the object – otherwise the structure is likely to be one of “apposition” (see 77. Pairing of Same-Meaning Nouns). Moreover, if there are two nouns after a linking verb, they must refer to the same person or thing – otherwise the one that is not the object will probably be an indirect object rather than a complement (see 126. Verbs with an Indirect Object).
A noteworthy feature of object complements is that if the verb in their sentence is made passive, its object becoming its subject, the same complement can still be present, but now as a “subject complement”:
(b) Tourists are seen (by local people) AS a source of income.
The problem with as before object (and subject) complements is that it is not always possible. In the following sentence, as would be grammatically incorrect before the object complement an invalid:
(c) Some injuries leave the victim … an invalid for life.
Sentences like this raise the obvious question of how we can tell when and when not to use as before an object complement. It is this problem that the present post is primarily about. In addressing it, the post also offers an extensive list of verbs that can take an object complement irrespective of any need for as.
For other as discussions, see 53. “As”, “Like” and “Such As”, 104. Naming Data Sources with “As”, 183. Statements between Commas, 225. Simultaneous Occurrence and 279. Grammatical Differences between Citation Verbs.
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CLUES FOR USING COMPLEMENT-SHOWING “as”
The simple determinant of the need for as before an object complement is the choice of verb: SEE in (a) requires it while LEAVE in (c) forbids it. Most of the verbs with an object complement are like either SEE or LEAVE, but a few allow a choice concerning as, or change their meaning with it added. There is no obvious reason why each verb has its own particular requirement. Memorisation often seems the surest way to avoid error.
It could be, however, that some clues concerning as are obtainable from the kinds of meanings of verbs with an object complement. To explore this possibility, the next section offers a meaning-based classification of these verbs, along with an indication of which verbs can, cannot and must have as.
The classification shows three fundamental meaning groups: those whose object complement is a name, those where it represents a role or objective description, and those where it represents a personal perception. However, I consider some role names unable to be an object complement:
(d) It is illegal to employ children as factory workers.
The underlined words here indicate more a temporary than a permanent role, and as before them can be paraphrased with in the role of. This gives the combination more the feel of an adverb phrase than a complement one (see 53. “As”, “Like” and “Such As”), suggesting that EMPLOY should perhaps be ruled out as a complement-taking verb.
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VERBS ALLOWING AN OBJECT COMPLEMENT
In addition to the three main meaning groups proposed above, the classification below has subgroups according to whether or not the object complement meaning is being newly associated with the object. Compare, for example, the following uses of CALL:
(e) Doctors call the tube that carries food to the stomach the oesophagus.
(f) Columbus called the first island he reached San Salvador.
Here, (e) is not describing the first attachment of the name oesophagus to the tube…: an ongoing tradition is being conveyed. Sentence (f), on the other hand, does describe the first attachment of the name San Salvador to the island in question. The use of LEAVE in (c) resembles this second use of CALL. For more on the difference between repeating and originating an action, see 238. Using a Verb to Perform its Action.
In the following classification, “(AS)” next to a verb means as is optional, “AS” that it is compulsory. Verbs marked * can optionally have to be before the object complement instead of as or no word at all (e.g. established the victim as/to be alive: see 192. When BE can be Omitted). My judgements of where to be is possible are subjective – other analysts might disagree. Nevertheless, the possibility of to be seems random but quite common, except with name verbs.
Naming Verbs
+ New Name
DUB
BAPTISE
CHRISTEN
NAME
+ Existing Name
ALLUDE TO… AS…
IDENTIFY… AS…
KNOW…AS…
+ Either
CALL
DESIGNATE (… AS…)
LABEL (…AS…)
REFER TO… AS…
SPEAK OF… AS…
TERM
Role & Description Verbs
+ New Role/Description
APPOINT* (…AS…)
CHOOSE*… AS…
COLOUR
CROWN
DECLARE*
ELECT* (…AS…)
ESTABLISH*… AS…
LEAVE
MAKE
NAME*… AS…
NOMINATE*… AS…
PAINT (= cover with paint)
PRONOUNCE*
TAKE (someone prisoner)
TRAIN*… AS…
+ Existing Role/Description
CITE… AS…
IDENTIFY*… AS…
KEEP (= maintain)
KNOW… AS…
MENTION… AS…
NAME…AS…
POINT OUT*… AS…
+ Either
ACKNOWLEDGE*… AS…
CALL
CATEGORISE… AS…
CHARACTERISE … AS …
CLASS… AS…
CLASSIFY… AS…
CONDEMN… AS…
CRITICISE…AS…
DEFINE… AS…
DEMONISE… AS…
DEPICT… AS…
DESCRIBE… AS…
DISTINGUISH… AS…
EVALUATE*… AS…
EXPRESS… AS…
GLORIFY… AS…
HIGHLIGHT… AS…
IDENTIFY*… AS…
INCLUDE … AS…
LABEL (…AS…)
MARK… AS…
MENTION… AS…
PAINT* (= describe)… AS…
PORTRAY*… AS…
PRAISE… AS…
PRESENT*… AS…
PROCLAIM* … AS…
RECOGNISE*… AS…
REFER TO… AS…
REPRESENT… AS…
SHOW … AS…
SINGLE OUT… AS…
SPEAK OF… AS…
Belief & Imagination Verbs
ACCEPT… AS…
BELIEVE*
CONCEPTUALISE… AS…
CONSIDER* (= believe)
CONSIDER… AS… (= imagine)
ESTIMATE*… AS…
FIND*
IMAGINE*… AS…
INTEND*… AS…
INTERPRET*… AS…
JUDGE*
LOOK ON…AS…
PERCEIVE*… AS…
PICTURE*… AS…
PROPOSE… AS…
RATE* (… AS…)
RECOMMEND… AS…
REGARD*… AS…
REJECT… AS…
SEE*… AS…
SUGGEST… AS…
TAKE*… AS…
THINK*
THINK OF… AS…
TREAT… AS…
UNDERSTAND*… AS…
VIEW… AS…
VISUALISE*… AS…
WANT*… AS…
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OBSERVATIONS ABOUT THE VERBS
Most of the verbs have a noun sometimes or always as their object complement. However, COLOUR and PAINT (= cover in paint) always have adjectives (see 278. Colours).
Many of the verbs are common in academic writing. For example, CALL, DEFINE, DESCRIBE, EVALUATE, FIND and CONSIDER often report as “citation” verbs (see 279. Grammatical Differences between Citation Verbs, #4), and are also characteristic of essays (see 94. Essay Instruction Words).
Some of the verbs can replace the noun or adjective after their object with an -ing verb. For example, after leave their victims… in sentence (c), one can say …suffering instead of …an invalid. Other verbs with this possibility include KEEP, RECOGNISE, SEE, VISUALISE, WANT and SEE (see 232. Verbs with an Object + “-ing”). I am not including this use as an object complement one.
Most of the verbs listed as always indicating a new link between their complement and object can actually convey an existing one when made passive. For example was baptised John could refer not just to the moment when the name John was newly given, but also to the state of having received it earlier (see 66. Types of Passive Verb Meaning).
With regard to the use of as, in general far more verbs require or allow it than disallow it. Naming verbs that disallow it are the four in the first subgroup (which always express a new name attachment), plus CALL and TERM in the third (which sometimes do). In category 2 (role & description verbs) half in the first subgroup (7 out of 15) disallow as. In the second subgroup, there is only KEEP (I consider purpose-indicating as after KEEP – e.g. keep sth as a souvenir – to be adverbial). In category 3, the only non-as verbs are BELIEVE, CONSIDER (= believe), FIND, JUDGE and THINK.
The need to include as so much more than to exclude it perhaps partly explains the common error of adding as after some of the verbs in the first two groups. Naming verbs like CALL are particularly often given an incorrect as (see 140. Words with Unexpected Grammar 2, #g, and 250. Synonym Pairs with Contrasting Grammar, #4).
Also notable is that as when not disallowed is overwhelmingly compulsory. A choice about using it is only possible with DESIGNATE in category 1, APPOINT, ELECT and LABEL in category 2, and RATE in category 3.
It will be observed that some verbs are listed twice above, sometimes with different as requirements. KNOW, LABEL, REFER TO and SPEAK OF appear in both category 1 and 2. Their ability to have a description as their object complement as well as a name may be illustrated as follows:
(g) (+ NAME) English speakers know Munchen as Munich.
(h) (+ DESCRIPTION) English people know William of Normandy as an invader.
It is also possible to use KNOW with to be instead of as before a descriptive noun or adjective, but the meaning changes subtly. In (h), the description expressed by as and the complement an invader is subjective – special to English people. With to be instead of as, descriptions are suggested to be objective facts, also expressible with know that…:
(i) The police know the fugitive to be a dangerous killer.
NAME is listed three times in categories 1 and 2. The use without as (in the first subgroup of category 1) is naming. The first use with as (category 1, subgroup 2) typically puts it before a name and is identifying (see 206. Ways of Conveying a Name). By contrast, the third use (in category 2) has a name before as and a role after (e.g. …as the successor). This I call “decreeing” (see 236. Tricky Word Contrasts 9, #2).
The two mentions of CONSIDER in category 3 again associate different meanings with different as requirements. For details of these meanings, see 48. Tricky Word Contrasts 1, #3.
Three other verbs worth mentioning are MAKE (category 2), SEE (category 3) and TAKE (category 3). MAKE is shown not to be usable with to be (despite a rare use that it has with be alone: see 271. Tricky Grammar Contrasts 3, #3). Non-usability with to be may seem surprising when verbs resembling MAKE in meaning, such as ARRANGE FOR and CAUSE, do need it (see 140. Words with Unexpected Grammar 2, #h). These latter verbs are not listed above because they always need to be, which I exclude as an object complement feature.
SEE is typical in allowing either as or to be without a change of meaning. However, it has meaning-changing possibilities too (see 315. Ways of Using SEE), including be without to (see 217. Tricky Grammar Contrasts 1, #6).
TAKE is atypical in having different meanings with as and to be. Both indicate a supposition, but as additionally implies action based on it (see 264. Variations in the Use of TAKE, #15 and #16).