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Language Devel. 3/11

present progressive verb 1st bound morpheme, all verbs take one ending, easy, action occurring
in & on acquired same time, free morpheme, easy observable concepts, no allomorph choice, need 3 word utterances
regular plural uses main word, 3 choices- s-z-ez
irregluar past acquired before past, due to imitation, over generalize, rule induction process, ex. ate
possessive hard to grasp, bound morpheme, same allomorph as plural
uncontractible copula changes with conjugations, 3 different forms ex. is
articles allomorphs, the=definite, a=abstract,
regular past cognitive skill->memory and pick right allomorph, walked
regular 3rd singular present tense in vincinity of now, same rules are plural, challenge knowing when to add ex. walks
irregular 3rd singular present tense question forms, do-did-does
uncontractible auxiliary verb free morpheme, needs another verb form in phrase ex. he is walking
contractible copula form of to be ex. he's happy
contractible auxiliary verb form of to be helping