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Selasa, 18 November 2014

Sturcture 1



Auxiliaries Verbs


An auxiliary verb is a verb that adds functional or grammatical meaning to the clause in which it appears—for example, to express tense, aspect, modality, voice, emphasis, etc. Auxiliary verbs usually accompany a main verb. The main verb provides the main semantic content of the clause.[1] An example is the verb have in the sentence I have finished my dinner. Here, the main verb is finish, and the auxiliary have helps to express the perfect aspect. Some sentences contain a chain of two or more auxiliary verbs. Auxiliary verbs are also called helping verbs, helper verbs, or (verbal) auxiliaries. They may be glossed with the abbreviation AUX.

Contents

Basic examples[edit]

Below are some sentences that contain representative auxiliary verbs from English, German, and French, with the auxiliary verb marked in bold:
a. Do you want tea? – do is an auxiliary accompanying the main verb want, used here to form a question – see do-support.
b. He has given his all. – has is an auxiliary used in expressing the perfect aspect of give.
c. Das wurde mehrmals gesagt. – wurde 'became' is an auxiliary used to build the passive voice in German.[2]
That became many times said = 'That was said many times.'
d. Sie ist nach Hause gegangen. – ist 'is' is an auxiliary used with movement verbs to build the perfect tense/aspect in German.[3]
She is to home gone = 'She went home/She has gone home.'
e. J'ai vu le soleil. – ai 'have' is an auxiliary used to build the perfect tense/aspect in French.[4]
I have seen the sun = 'I have seen the sun/I saw the sun.'
f. Nous sommes arrivĂ©s. – sommes 'are' is an auxiliary used to build the passive voice in French.[5]
We have arrived also as 'we are arriving'
These auxiliaries help express a question, show tense/aspect, or form passive voice. Auxiliaries like these typically appear with a full verb that carries the main semantic content of the clause.

Traits of auxiliary verbs across languages[edit]

Auxiliary verbs typically help express grammatical tense, aspect, mood, and voice. They typically appear together with a main verb. The auxiliary is said to "help" the main verb. The auxiliary verbs of a language form a closed class, i.e., there is a fixed, relatively small number of them.[6] They are often among the most frequently occurring verbs in a language.[citation needed]
Widely acknowledged verbs that can serve as auxiliaries in English and many related[clarification needed] languages are the equivalents of be to express passive voice, and have (and sometimes be) to express perfect aspect or past time reference.[7]
In some treatments, the copula be is classed as an auxiliary even though it does not "help" another verb, e.g.,
The bird is in the tree. – is serves as a copula with a predicative expression not containing any other verb.
Definitions of auxiliary verbs are not always consistent across languages, or even among authors discussing the same language. Modal verbs may or may not be classified as auxiliaries, depending on the language. In the case of English, verbs are often identified as auxiliaries based on their grammatical behavior, as described below. In some cases, verbs that function similarly to auxiliaries, but are not considered full members of that class (perhaps because they carry some independent lexical information), are called semi-auxiliaries. In French, for example, verbs such as devoir (have to), pouvoir (be able to), aller (be going to), vouloir (want), faire (make), and laisser (let), when used together with the infinitive of another verb, can be called semi-auxiliaries.[8]

Auxiliary verbs in English[edit]

The following sections consider auxiliary verbs in English. They list auxiliary verbs, then present the diagnostics that motivate this special class (subject-auxiliary inversion and negation with not). The modal verbs are included in this class, due to their behavior with respect to these diagnostics.

A list of auxiliaries in English[edit]

A list of verbs that (can) function as auxiliaries in English is as follows:[9]
be (am, are, is, was, were, being, been), can, could, dare, do (does, did), have (has, had, having), may, might, must, need, ought, shall, should, will, would
The status of dare, need (not), and ought (to) is debatable.[10] and the use of these verbs as auxiliaries can vary across dialects of English. If the negative forms can't, don't, won't, etc. are viewed as separate verbs (and not as contractions), then the number of auxiliaries increases. The verbs do and have can also function as full verbs or as light verbs, which can be a source of confusion about their status. The modal verbs (can, could, may, might, must, shall, should, will, would, and dare, need and ought when included) form a subclass of auxiliary verbs. Modal verbs are defective insofar as they cannot be inflected, nor do they appear as gerunds, infinitives, or participles.
The following table summarizes the auxiliary verbs in standard English and the meaning contribution to the clauses in which they appear. Many auxiliary verbs are listed more than once in the table based upon discernible differences in use.
Auxiliary verb
Meaning contribution
Example
be1
She is the boss.
be2
progressive aspect
He is sleeping.
be3
passive voice
They were seen.
can1
deontic modality
I can swim.
can2
epistemic modality
Such things can help.
could1
deontic modality
I could swim.
could2
epistemic modality
That could help.
dare
epistemic modality
How dare you!
do
do-support/emphasis
You did not understand.
have1
perfect aspect
They have understood.
may1
deontic modality
May I stay?
may2
epistemic modality
That may take place.
might
epistemic modality
We might give it a try.
must1
deontic modality
You must not mock me.
must2
epistemic modality
It must have rained.
need
deontic modality
You needn't water the grass.
ought
deontic modality
You ought to play well.
shall
deontic modality
You shall not pass.
should1
deontic modality
You should listen.
should2
epistemic modality
That should help.
will
epistemic modality
We will eat pie.
would
epistemic modality
Nothing would accomplish that.
Deontic modality expresses an ability, necessity, or obligation that is associated with an agent subject. Epistemic modality expresses the speaker's assessment of reality or likelihood of reality. Distinguishing between the two types of modality can be difficult, since many sentences contain a modal verb that allows both interpretations.

Diagnostics for identifying auxiliary verbs in English[edit]

The verbs listed in the previous section can be classified as auxiliaries based upon two diagnostics: they allow subject–auxiliary inversion (the type of inversion used to form questions etc.) and (equivalently) they can take not as a postdependent (a dependent that follows its head). The following examples illustrate the extent to which subject–auxiliary inversion can occur with an auxiliary verb but not with a full verb:[11]
a. He was working today.
b. Was he working today? - Auxiliary verb was allows subject–auxiliary inversion.
a. He worked today.
b. *Worked he today? - Full verb worked does not allow subject–auxiliary inversion.
a. She can see it.
b. Can she see it? - Auxiliary verb can allows subject–auxiliary inversion.
a. She sees it.
b. *Sees she it? - Full verb sees does not allow subject–auxiliary inversion.
(The asterisk * is the means commonly used in linguistics to indicate that the example is grammatically unacceptable.) The following examples illustrate that the negation not can appear as a postdependent of a finite auxiliary verb, but not as a postdependent of a finite full verb:[12]
a. Sam would try that.
b. Sam would not try that. - The negation not appears as a postdependent of the finite auxiliary would.
a. Sam tried that.
b. *Sam tried not that. - The negation not cannot appear as a postdependent of the finite full verb tried.
a. Tom could help.
b. Tom could not help. - The negation not appears as a postdependent of the finite auxiliary could.
a. Tom helped.
b. *Tom helped not. - The negation not cannot appear as a postdependent of the finite full verb helped.
A third diagnostic that can be used for identifying auxiliary verbs is verb phrase ellipsis. Auxiliary verbs can introduce verb phrase ellipsis, but main verbs cannot.[citation needed] See the article on verb phrase ellipsis for examples.
Note that these criteria lead to the copula be being considered an auxiliary (it undergoes inversion and takes postdependent not, e.g., Is she the boss?, She is not the boss). However, if one defines auxiliary verb as a verb that somehow "helps" another verb, then the copula be is not an auxiliary, because it appears without another verb. The literature on auxiliary verbs is somewhat inconsistent in this area.[13]

Auxiliary verbs vs. light verbs[edit]

Some syntacticians distinguish between auxiliary verbs and light verbs.[14][15] The two are similar insofar as both verb types contribute mainly just functional information to the clauses in which they appear. Hence both do not qualify as separate predicates, but rather they form part of a predicate with another expression - usually with a full verb in the case of auxiliary verbs and usually with a noun in the case of light verbs.
In English, light verbs differ from auxiliary verbs in that they cannot undergo inversion and they cannot take not as a postdependent. The verbs have and do can function as auxiliary verbs or as light verbs (or as full verbs). When they are light verbs, they fail the inversion and negation diagnostics for auxiliaries, e.g.
a. They had a long meeting.
b. *Had they a long meeting? - Light verb had fails the inversion test.
c. *They had not a long meeting. - Light verb had fails the negation test.
a. She did a report on pandering politicians.
b. *Did she a report on pandering politicians? - Light verb did fails the inversion test.
c. *She did not a report on pandering politicians. - Light verb did fails the negation test.
(In some cases, though, have may undergo auxiliary-type inversion and negation even when it is not used as an auxiliary verb – see Subject–auxiliary inversion: Inversion with other types of verb.)
Sometimes the distinction between auxiliary verbs and light verbs is overlooked or confused. Certain verbs (e.g., used to, have to, etc.) may be judged as light verbs by some authors, but as auxiliaries by others.[16]

Multiple auxiliaries[edit]

Most clauses contain at least one main verb, and they can contain zero, one, two, three, or perhaps even more auxiliary verbs.[17] The following example contains three auxiliary verbs and one main verb:
The paper will have been scrutinized by Fred.
The auxiliary verbs are in bold and the main verb is underlined. Together these verbs form a verb catena (chain of verbs), i.e., they are linked together in the hierarchy of structure and thus form a single syntactic unit. The main verb scrutinized provides the semantic core of sentence meaning, whereby each of the auxiliary verbs contributes some functional meaning. A single finite clause can contain more than three auxiliary verbs, e.g.
Fred may be being judged to have been deceived by the explanation.
Viewing this sentence as consisting of a single finite clause, there are five auxiliary verbs and two main verbs present. From the point of view of predicates, each of the main verbs constitutes the core of a predicate, and the auxiliary verbs contribute functional meaning to these predicates. These verb catenae are periphrastic forms of English, English being a relatively analytic language. Other languages, such as Latin, are synthetic, which means they tend to express functional meaning with affixes, not with auxiliary verbs.
The periphrastic verb combinations in the example just given are represented now using the dependency grammar tree of the sentence; the verb catena is in green:[18]
The particle to is included in the verb catena because its use is often required with certain infinitives. The hierarchy of functional categories is always the same. The verbs expressing modality appear immediately above the verbs expressing aspect, and the verbs expressing aspect appear immediately above the verbs expressing voice. The verb forms for each combination are as follows:
Functional meaning
Verb combination
Example
Modality
finite modal verb + infinitive
may be
Perfect aspect
form of auxiliary verb have + perfect active participle
have been
Progressive aspect
form of auxiliary verb be + progressive active participle
be being
Passive voice
form of auxiliary verb be + passive participle
been deceived
English allows clauses with both perfect and progressive aspect. When this occurs, perfect aspect is superior to progressive aspect, e.g.


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