GRAMMATICAL CATEGORY pl . of GRAMMATICAL CATEGORY . In my time it was the 9 parts of the sentence: noun, adjective, article, pronoun, verb, adverb, preposition and interjection. Today it refers to a linguistic variable that can take different values. for example, the class of verbs present different variations or realizations according to their tense, mode, person, etc. , and each variable can take different values, for example the variable "time" can take the values of past, present or future.