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Locative Adverbial Phrases
Locative adverbial phrases are multi-word adverbial modifiers whose
meanings relate to spatial location. Locatives consist of a locative adverb
(such as ahead or downstream) preceded by an NP, an adverb, or
nothing, as in Examples ((329))-((331)) respectively. The modifier as a
whole describes a position relative to one previously
specified in the discourse. The nature of the relation, which is usually
a direction, is specified by the anchoring locative adverb(behind, east). If an NP or a second adverb is present in the phrase, it specifies the
degree of the relation (for example: three city blocks, many meters,
and far).
(328)0(328
- (329)
- The accident three blocks ahead stopped traffic
(329)0(329
- (330)
- The ship sank far offshore
(330)0(330
- (331)
- The trouble ahead distresses me
Locatives can modify NPs, VPs and Ss. They modify NPs only by right-adjoining
post-positively, as in Example ((329)). Post-positive is also the more
common position when a locative modifies either of the other categories.
Locatives pre-modify VPs only when separated by balanced punctuation
(commas or dashes). The trees locatives select when modifying NPs are shown
in Figure 19.16.
Figure:
Locative Modifier Trees: nxnxARB, nxARB
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When the locative phrase consists of only the anchoring locative adverb, as in
Example ((330)), it uses the nxARB tree, shown in
Figure 19.16, and its VP analogue, vxARB. In
addition, these are the trees selected when the locative anchor is
modified by an adverb expressing degree, as in Example (330). The
degree adverb adjoins on to the anchor using the ARBarb tree,
which is described in Section 19.5. Figure 19.17
shows an example of these trees in action. Though there is a tree
for a pre-sentential locative phrase, nxARBs, there is no
corresponding post-sentential tree, as it is highly debatable whether
the post-sentential version actually has the entire sentence or just
the preceding verb phrase as its scope. Thus, in accordance with XTAG
practice, which considers ambiguous post-sentential modifiers to be
VP-modifiers rather than S-modifiers, there is only a vxnxARB
tree, as shown in Figure 19.17.
Figure 19.17:
Locative Phrases featuring NP and Adverb Degree Specifications
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One possible analysis of locative phrases with NPs might maintain that
the NP is the head, with the locative adverb modifying the NP. This is
initially attractive because of the similarity to time NPs, which also
feature NPs that can modify clauses. This analysis seems insufficient,
however, in light of the fact that virtually any NP can occur in
locative phrases, as in example ((332)). Therefore, in the XTAG analysis
the locative adverb anchors the locative phrase trees. A complete summary
of all trees selected by locatives is contained in Table 19.3.
2619.9 adverbs select the locative trees.
(331)0(331
- (332)
- I left my toupee and putter three holes back
Table 19.3:
Locative Modifiers
|
Degree Phrase Type |
Category Modified |
NP |
Ad/None |
NP |
nxnxARB |
nxARB |
VP (post) |
vxnxARB |
vxARB |
VP (pre, punct-separated) |
punxARBpuvx |
puARBpuvx |
S |
nxARBs |
ARBs |
|
Next: Auxiliaries
Up: Modifiers
Previous: Adverbs
XTAG Project
1998-09-14