Thus the sentence is a grammatical unit that consists of one or more than one clause;the clause,one or more than one phrase;the phrase,one or more than one ●● word;and the word,one or more than one morpheme. The sentence is the highest rank of grammatical unit while the morpheme is the minimum or the lowest rank.A full sentence can generally be segmented rank by rank down to its smallest constituents--- the morphemes. 22 • Thus the sentence is a grammatical unit that consists of one or more than one clause; the clause, one or more than one phrase; the phrase, one or more than one word; and the word, one or more than one morpheme. • The sentence is the highest rank of grammatical unit while the morpheme is the minimum or the lowest rank. A full sentence can generally be segmented rank by rank down to its smallest constituents--- the morphemes