Introduction- Grammatical Hierarchy Grammar is the structural system of a language. The grammar of English is organized into five ranks: the sentence, the clause, the phrase, the word and the morpheme Each rank is composed of one or more than one grammatical unit of the immediate lower unit. A full sentence can generally be segmented rank by rank down to its smallest constituents---the morphemesIntroduction-Grammatical Hierarchy • Grammar is the structural system of a language. The grammar of English is organized into five ranks: the sentence, the clause, the phrase, the word and the morpheme. Each rank is composed of one or more than one grammatical unit of the immediate lower unit. A full sentence can generally be segmented rank by rank down to its smallest constituents---the morphemes