Five Grammatical Morphemes That Children Acquire During the Preschool Period

Short Answer

Five grammatical morphemes that children acquire during the preschool period are (1) standard plurals (formed by adding -s); (2) regular past tense (formed by adding -ed); (3) progressive tense (formed by adding -ing); (4) possession (formed by adding -'s); and (5) definite and indefinite articles (use the/an/a). Various research studies suggest these grammatical morphemes tend to emerge in an invariant order. List the five morphemes above in their typical order of emergence.