1.3 A Typology of Word Categories

Having introduced some of the basic concepts, let us now turn to look at what categories we need to refer to in the description of a language like English. In generative linguistics it is often seen as a positive aim to keep basic theoretical equipment to a bare minimum and not to expand these unnecessarily. This can be seen in the standard approach to word categories in terms of the attempt to keep these to as small a number as possible. In the present book we will mainly be concerned with eight basic categories. These come in two general types: thematic categories and functional categories. In the thematic categories we have verbs (V), nouns (N), adjectives (A) and prepositions (P) and in the functional categories there are inflections (I), determiners (D), degree adverbs (Deg) and complementisers (C). Thus we have the following classification system:

1.3.1 Categorial features

We see from the discussion above the predictive power of the system that we have set up: the system predicted that there should be a fourth thematic category that has certain properties and these fit the category of prepositions very well. We can take this as evidence in favour of this system of features. What else does the system predict? It is clearly predicted that if we add a third binary feature to the two we have just been discussing, then a further four categories will be defined. This again matches perfectly with the description of categories we started this section with, as seen in (23). With the third feature, [±F], there should be four functional categories which match the four thematic categories in terms of their feature settings for [±N] and [±V]. We have already seen how determiners and modals can be analysed as functional nouns and functional verbs, respectively. The expectation is that degree adverbs, such as so and too, and complementisers, such as that and if, should be related to adjectives and prepositions in the same way. As degree adverbs modify adjectives in a very similar way to how determiners modify nouns, it is not difficult to conclude that degree adverbs are functional adjectives. This leaves complementisers to fill the final place as functional prepositions. There is evidence in favour of this assumption, but it rests on notions not yet introduced, so we will have to wait until later to demonstrate it.

1.3.4.3 Adjectives

However, unlike the case of the ungradable adjectives, we can express comparative and superlative notions with morphologically complex adjectives using degree adverbs more and most:

1.3.4.3 Adjectives

We see from these examples that the same kinds of words (very, as, too, so, etc. – known as degree adverbs) are used to modify both adjectives and adverbs. Such things cannot be used to modify words of other categories:

1.3.5.2 Determiners

Traditionally this group of quantifiers are known as post-determiners as they always follow other determiners (which are sometimes called central determiners). This terminology gives the impression that post-determiners are a subclass of determiner, which is likely to be inaccurate. These elements often have many adjectival qualities, including being able to be modified by degree adverbs and having comparative and superlative forms:

1.3.5.3 Degree Adverbs

1.3.6 Functionally underspecified categories

It is clear that these elements are not thematic and hence should not be analysed as adjectives such as pink, certain or keen, for example. For one thing, they cannot be used predicatively as adjectives can, making them more like degree adverbs:

1.3.6 Functionally underspecified categories

However, degree adverbs do not have comparative and superlative forms and so it would be inaccurate to categorise the post-determiners as functional adjectives (i.e. as [+F, +N, +V]). Therefore we propose that these elements be categorised as [+N, +V] elements. It seems that post-determiners always select nominal complements, which is why they have been confused with determiners and hence they have the following lexical entries:

7.3.2 Wh-movement

Wh-elements come in a variety of forms and functions. All of them contain some element that has an interrogative interpretation, which may be a pronoun, a determiner or a degree adverb: