Constraint-based Syntax 2: Week 4

Simplifying the Grammar of Ginzburg and Sag (2000)

Parts of Speech

Our online grammar uses the following type hierarchy for parts of speech (the values of the feature HEAD):

The hierarchy differs from that in GS in two ways:

1. their type gerund is omitted (since we are not going to deal with gerunds in this class)
2. the type adverb has been added.

The following table lists the parts of speech and some words belonging to them:

Type	Full name	Examples
v	verb	snore, like, must, to
c	complementizer	that, whether, if
a	adjective	big, new, red
p	preposition	to, of, with
n	noun	Lilly, she
d	determiner	the, a, any
adv	adverb	early, very, not

Head Features

The next table lists all the head features of all the parts of speech and explains their function:

Feature	Value type	Function of the feature
PRED(icative)	boolean	Is the sign predicative or not?
MOD(ification)	mod-synsem	Can the sign modify and if yes, what kind of synsem?
AGR (element)	age	What are the agreement features of the sign?
VFORM (verb form)	vform	What is the verb's verb form?
AUX (iliary)	boolean	Is the verb an auxiliary?
Neg(aged)	boolean	Is the verb negated?
CASE	case	What case does the nominal sign carry?
SPEC(ified)	sem-obj	What is the content of the noun specified by the determiner?
DEG(red)	bool	Is the adjective (phrase) specified by a degree adverb?
NOT	boolean	Is the adverb the negation not?
P(reposition)FORM	form	Which preposition is it?

The verb form hierarchy

The different verb forms that the framework makes available form another important aspect of the theory:

The table below gives an overview of all verb forms with examples:

Verb form	Full name	Examples
fin	finite (indicative)	is, must, dances, dance (non-third person singular), danced (past tense)
inf	infinitive	to (the infinitive marker)
base	base form (= bare infinitive)	be, dance, call
prp	present participle	being, dancing, calling
pfp	perfect participle	been, danced, given
pas	passive participle	invited, rumored, introduced

Valence

In Week 1 we saw that all signs carry the 3 valence features SUBJ, SPR, and COMPS, which are list-valued. Corresponding to each valence feature, there is a phrase type: hd-subj-ph, hd-spr-ph, and hd-comp-ph. As the names suggest, each phrase has a head daughter and additionally a SUBJ, SPR, or one or two COMPS daughters. The projection of these phrases is driven by the head daughter's valence features as illustrated in Week 1.

The linguistic objects on the valence lists (i.e. the valents) are of type synsem. In order to simplify the representations of the valents, we use the following abbreviations:

VP = a phrase of part of speech v which is COMPS <> , SPR <>, and SUBJ <synsem>

AP = a phrase of part of speech a which is COMPS <> , SPR <>, and SUBJ <synsem>

S = a phrase of part of speech v which is COMPS <>, SPR <>, and SUBJ <>

NP = a phrase of part of speech n which is COMPS <>

PP = a phrase of part of speech p which is COMPS <> , SPR <>, and SUBJ <>

This permits us to write valence lists like the following, where the information in the brackets further specify inflectional properties of the valents which should be self-explanatory:

Example	SUBJ	COMPS
snores	<NP[nom]>	<>
likes	<NP[nom]>	<NP[acc]>
put	<NP>	<NP[acc],PP>
persuade	<NP>	<NP[acc],VP[inf]>
afraid	<NP>	<PP>
of	<>	<NP[acc]>
that (C)	<>	<S[fin]>

Words

So far, we have introduced the following concepts:

• Our grammar deals with signs which are either words or phrases.
• Every sign belongs to a maximal part of speech, which may have features.
• Signs also have the 3 valence attributes SUBJ, SPR, and COMPS which contain a description of the syntactic and semantic information of other signs.
• These valence features drive the formation of specific phrases.

In preparation of a more detailed look at phrases, look at the lexical entries of the words in the table below in the online grammar. Where applicable, try out different inflectional forms, e.g. snores, snoring, snored or she, her. Pay attention to the part of speech, its features, and the 3 valence features of each word:

Online Grammar for Chapter 2: HPSG Background

Type	Full name	Examples
v	verb	snore, like, must, to
c	complementizer	that, whether, if
a	adjective	big, new, red
p	preposition	to, of, with
n	noun	Lilly, she
d	determiner	the, a, any
adv	adverb	early, very, not

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