Only the substantive verb (to be) has eight forms: be, am, is, are, was, were, being, been.
(In Insular Celtic, there are two verbs for "to be," a substantive verb with the meaning, roughly, "to exist," and a linking verb such as "is" in "John is a boy" or "sky is blue").
Adverbs of frequency tend to come immediately after the substantive verb (You are often late), before other verbs (You never know), and between auxiliaries and full verbs (You can never tell).
As in Modern Welsh, the inherited present tense has largely future meaning, and present time is mainly expressed by the present-tense form of the substantive verb and the preposition a ig) with the verbal noun.
The gap thus left was filled, as in Scottish Gaelic and Manx, by a construction involving the substantive verb and the verbal noun; e.g., y mae'r wraig yn myned "the woman goes" or "the woman is going" is composed of the verb mae "is" and the verbal noun myned "going".
(The substantive verb 'is' requires special treatment).
Thus, to reiterate again, the three linguistic forms of substantive, adjective, and verb are required to express thought's apprehension of (independent) objects, (dependent) properties, and relations (respectively).
Alternatively, one might identify the logical constants with members of functional categories (including tense, complementizers, auxiliaries, determiners, and pronouns), and the nonlogical constants with members of substantive categories (including nouns, verbs, adjectives, adverbs, and prepositions) (for this terminology, see Chomsky 1995, 6, 54 and Radford 2004, 41).
One idea that has been used in such characterizations, and that is also present in Aristotle, is that logical expressions do not, strictly speaking, signify anything; or, that they do not signify anything in the way that substantives, adjectives and verbs signify something.
I can say all the Latin substantive and adjectives and active verbs besides 52 lines of Latin poetry.
In the translating process, he enriched the Hebrew language through the borrowing of Arabic words and the adoption of the Arabic practice of forming verbs from substantives.
