1.3.5.1 Inflections
The feature bundle [+F, –N, +V] defines a ‘functional verb’. Such an element would have verbal properties, but no thematic content: it would not be specified for taking arguments in its lexical entry and hence would have no theta-grid. The most obvious thing that fits this bill is the class of auxiliary verbs:
| (133) | a | they have gone |
| b | he is shaving | |
| c | she can swim |
We need to distinguish between two groups of auxiliary verb, however. (133a) and (133b) involve aspectual auxiliaries (perfective and progressive respectively). (133c) concerns a modal auxiliary. These two types of auxiliaries differ not only in their semantic content, but also in their syntactic behaviour. For example, while modal auxiliaries are in complementary distribution with one another (there can only ever be one per clause), they are not in complementary distribution with the aspectuals. The aspectual auxiliaries are also not in complementary distribution with each other:
| (134) | a | *he can will fly |
| b | he may have fallen | |
| c | he must be hiding | |
| d | he has been drinking |
This distribution pattern would argue that modals occupy a different position to aspectuals. This position, note, is always in front of all other verbal elements.
Modal auxiliaries are also in complementary distribution with other elements of the clause. But before we can discuss this, we need to distinguish between two types of clause. Consider the clauses in brackets in the following:
| (135) | a | I think [that Sam saw me] |
| b | I was anxious [for Sam to see me] |
These two clauses express the same thematic content: a seeing relationship holding between Sam and me. However, they differ in a number of ways. In (135a) the verb is inflected for tense (past in this case) whereas in (135b) the verb is uninflected and cannot display tense distinctions:
| (136) | *I was anxious [for no one to saw/sees me] |
We call sentences with verbs inflected for tense finite clauses and those without, non-finite clauses. In finite clauses, the nominal element that is in front of the verb, if it is expressed as a pronoun, has a certain form, but it has another form in non-finite clauses:
| (137) | a | I think [that he saw me] |
| b | I was anxious [for him to see me] |
This distinction is traditionally called a Case distinction, which has to do with the forms that certain nominal arguments appear in. In English there are not many Case distinctions to be seen as it is only the pronouns which have Case forms, but in other languages there can be more such distinctions made (think of Hungarian János, Jánost, Jánosnak, etc.). The he form of the pronoun (similarly, she, I, we, they) is called the nominative case form, while the him form (her, me, us, them) is the accusative case form. Note, finite clauses must have nominative elements in the relevant position, whereas, if the position is filled at all in non-finite clauses, it must be by an accusative element:
| (138) | a | *I think [that him saw me] |
| b | *I was anxious [for he to see me] |
We can also see a difference between the clause types in terms of the word that introduces them, the complementiser. For the finite clause, the complementiser must be that and for this kind of non-finite clause, the complementiser must be for:
| (139) | a | *I think [for he saw me] |
| b | *I was anxious [that him to see me] |
Finally, finite clauses can stand as the main sentence, in which other embedded sentences can appear. A non-finite clause is always an embedded clause:
| (140) | a | he saw me |
| b | *him to see me |
Returning to the modal auxiliaries, note that these can only appear in finite clauses:
| (141) | a | I think [that he could see me] |
| b | *I was anxious [for him to could see me] |
There are two points of interest. First, when a modal does appear in a finite clause, the verb does not appear in its finite (tensed) form:
| (142) | *I think [that he could saw me] |
Second, the non-finite clause contains an element not found in finite clauses which appears to occupy the same position as the modal in finite clauses:
| (143) | a | I think [that he could see me] |
| b | I was anxious [for him to see me] |
Putting these together, we find that there are three elements here which are in complementary distribution: modals, the non-finite element to and the finite inflections on verbs. In any clause, wherever one of these appears, the others cannot:
| (144) | a | I think [that he may leave/*leaves/*to leave] |
| b | I think [that he left/*can left/*to left] | |
| c | I was anxious [for him to leave/*must leave/*leaves] |
We have spoken about complementary distribution patterns before, concluding that elements that are in complementary distribution should be analysed as instances of the same category. If this argument applies here, then modals, finite inflections and the non-finite element to are to be analysed as of the same category. While this makes perfect sense for modals and to, as these are words which appear to occupy the same position in the clause, it seems somewhat odd to claim that the finite inflections belong to this category. For a start, finite inflections are inflections that appear on the verb, not independent words themselves. However, there are things which seem to form part of other things in sentences, but which we might want to claim that at some deeper level of analysis are independent from them. Consider the status of n’t in negated auxiliaries such as can’t, won’t, couldn’t, etc. In one sense this element is part of the auxiliary, but in another sense it is an independent element expressing negation in exactly the same way that its non-contracted counterpart not does. It would seem reasonable to suggest that the contracted negative is an independent lexical item, with its own lexical entry (perhaps even the same one as the non-contracted negation) and that as such it enters the sentence as a word. Then there are syntactic processes which combine the auxiliary and negation into a single element:
| (145) |
It could be argued that the same thing is true of finite inflections: they enter a sentence as an independent word, but are joined with the verb by some syntactic process. If this is true, then there would be nothing wrong with treating finite inflections as the same kind of thing as modal auxiliaries as they could occupy the same underlying position:
| (146) |
One argument in support of this treatment of finite inflections concerns the difference between inflectional morphemes and derivational morphemes, discussed above. A derivational morpheme forms a new word from an existent one in the lexicon. This new word has lexical properties of its own and may even differ in its meaning from the original word. Furthermore, the process tends to be limited, applying to a selection of lexical elements rather than to whole classes. Inflectional morphology, on the other hand, does not change the lexical element, it just provides another form of that word. Often, it adds some element of meaning (such as tense or plural) to the meaning of the original word rather than changing the meaning to something else. This all suggests that the two processes are very different and that derivational morphology is something that goes on in the lexicon to expand the number of available words. Inflectional morphology is, on the other hand, too regular to be a lexical process, applying to whole categories. This would seem to be the hallmark of a syntactic process not a lexical one. We will assume therefore that verbal morphemes expressing tense and agreement are independent words inserted into a sentence in their own position and undergo a subsequent syntactic process which combines them with the verb that they are attached to.
We, therefore, have a functional category with three main members: modal auxiliaries, the non-finite to and finite inflections. This category has been called inflection, sometimes abbreviated to INFL or more usually these days I.
Given that inflection is a functional category and takes no part in thematic structure, members of this category do not have theta grids as part of their lexical entry. Furthermore, their subcategorisation seems to be much simpler than any thematic category: all inflections are always followed by a verbal element and hence we might suppose that they all subcategorise for verbal complements:
| (147) | will | category: | [+F, –N, +V] | |
| subcat: | [verbal] | |||
| can | category: | [+F, –N, +V] | ||
| subcat: | [verbal] | |||
| ed | category: | [+F, –N, +V] | ||
| subcat: | [verbal] | |||
| to | category: | [+F, –N, +V] | ||
| subcat: | [verbal] |