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The analysis of adverbial comparatives encouragingly parallels the
analysis for nominal and elliptical adjectival comparatives--with,
however, some interesting differences. Some examples of adverbial
comparatives and their distribution are given in the following:
(441)0(441
- (442)
- Albert works more quickly.
(442)0(442
- (443)
- Albert works more quickly than Richard.
(443)0(443
- (444)
- Albert works more.
(444)0(444
- (445)
- *Albert more works.
(445)0(445
- (446)
- Albert works more than Richard.
(446)0(446
- (447)
- Hobbes eats his supper more quickly than Calvin.
(447)0(447
- (448)
- Hobbes more quickly eats his supper than Calvin.
(448)0(448
- (449)
- *Hobbes more quickly than Calvin eats his supper.
When more is used alone as an adverb, it must also
occur after the verb phrase. Also, it appears that adverbs modified by
more and less have the same distribution as when they are
not modified. However, the than portion of an adverbial
comparative is restricted to post verb phrase positions.
The first observation can be captured by having more and less select only vxARB from the set of adverb trees.
Comparativization of adverbs looks very similar to that of other
categories, and we follow this trend by giving the tree in
Figure 22.11(a), which parallels the adjectival and
nominal trees, for these instances. This handles the quite free
distribution of adverbs which have been comparativized, while the tree
in Figure 22.11(b), vxPnx, allows the than
portion of an adverbial comparative to occur only after the verb
phrase, blocking examples such as ((449)).
Figure 22.11:
Adverbial comparative trees
|
|
|
(a) CARBarb tree |
(b) vxPnx tree |
|
|
The usage of the compar feature parallels that of the adjectives
and nominals; however, trees which adjoin to VP are compar- on
their root VP node. In this way, vxPnx anchored by than
or as (which must adjoin to a compar+ VP) can only adjoin
immediately above a comparative or comparativized adverb. This avoids
extra parses in which the comparative adverb adjoins at a VP node
lower than the than-clause.
A final note is that as may anchor vxPnx
non-comparatively, as in sentence ((450)). This means that
there will be two parses for sentences such as ((451)).
(449)0(449
- (450)
- John works as a carpenter.
(450)0(450
- (451)
- John works as quickly as a carpenter.
This appears to be a legitimate ambiguity. One is that John
works as quickly as a carpenter (works quickly), and the other is that
John works quickly when he is acting as a carpenter (but maybe he is
slow when he acting as a plumber).
Next: Future Work
Up: Propositional Comparatives
Previous: Adjectival Comparatives
XTAG Project
1998-09-14