Syntactic pivot
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The syntactic pivot is the verb argument around which sentences "revolve", in a given language. This usually means the following:
- If the verb has more than zero arguments, then one argument is the syntactic pivot.
- If the verb agrees with at least one of its arguments, then it agrees with the syntactic pivot.
- In coordinated propositions, in languages where an argument can be left out, the omitted argument is the syntactic pivot.
The first two characteristics have to do with simple
morphosyntax, and from them it is quite obvious the syntactic pivot in
English (and most other European languages) is what we call the
subject. An English verb cannot lack a subject, and cannot have just a direct
object and no subject; and (at least in the present tense, and for the verb
to be) it agrees partially with the subject.
The third point deserves an explanation. Suppose the following sentence:
- I shot the deer and killed it.
There are two coordinated propositions, and the second proposition lacks an explicit subject, but since the subject is the syntactic pivot, then the second proposition is assumed to have the same subject as the first one. One cannot do this with a direct object (in English). The result would be either ungrammatical or with a different meaning:
- *I shot the deer and (I) killed.
The syntactic pivot is a feature of the
morphosyntactic alignment of the language. In
nominative-accusative languages the syntactic pivot is the so-called "subject" (the argument marked with the
nominative case). In
ergative-absolutive languages the syntactic pivot may be the argument marked with the
absolutive case, but this is not always so, since ergative languages are often not "pure" and show a mixed behaviour (e. g. ergative morphology and accusative syntax).
Languages with a passive voice construction may resort to it in order to allow the default syntactic pivot to shift its semantic role (from agent to patient) in a coordinated proposition:
- He worked hard and was awarded a prize.
(Another common function of passive voice, related to this, is to introduce a new
topic that is a patient instead of an agent.)
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