Brown (1973) found that irregular past tenses were the 5th of the 14 grammatical morphemes develop, and that this acquisition occurred before age three. However, irregular past tense verbs are an important part of the English morphologic system and are among the most frequently used verbs in the language (Bybee & Slobin, 1982 Shipley & Banis, 1989). ![]() There are approximately 200 irregular verb forms in the English language, but many of these are archaic or used very infrequently (Bybee & Slobin, 1982). Brown's order of morphologic development in their instruction of language acquisition. Present progressive in, on Plural Past irregular Possessive Uncontractible copula Articles Past regular Third person regular Third person irregular Uncontractible auxiliary Contractible copula Contractible auxiliary Note: From Brown's A first language: The early stages, p Copyright 1973 by the President and Fellows of Harvard College. Morpheme of development of 14 grammatical Average Rank 1. Muma, Pierce, and Muma (1983) have also reported that 65 of the 76 speech-language pathology training programs that responded their survey used- TABLE 1. The impact of this sequence has been considerable, as evidenced by the number of our major textbooks in language development, assessment, and treatment that present and discuss these findings (e.g., Berko Gleason, 1989 Bloom & Lahey, 1978 Dale, 1976 devilliers & devilliers, 1978 Lund & Duchan, 1988 McLean & Snyder-McLean, 1978 Muma, 1978 Owens, 1988 Reed, 1986 Wiig & Semel, 1980 Wood, 1981). Based on the data from these three children, Brown developed the sequence of development for 14 grammatical morphemes seen in Table 1. KEY WORDS: language development, irregular past tenses, morphologic development A considerable amount of our knowledge about children's morphologic development is derived from Brown's (1973) classic longitudinal study of Adam, Eve, and Sarah. A preliminary order of development of the irregular verbs and possible clinical implications are offered. It was found that some irregular verbs (e.g., hit) were correctly produced by the three year olds, but other irregulars (e.g., bent) were still not mastered by age 9. One hundred and twenty children between 3:0 and 9:0 were examined as they responded a picture of the target verb with a sentencecompletion task. ![]() The purpose of this study was gain a preliminary view of children's development of 49 irregular verbs. However, other researchers and clinicians have suggested that irregular verbs continue developing much later in the school-age years. Several other researchers have also noted this early development of irregular verb forms. Driver Speech-Language Pathologist, City School District, Bakersfield, CA In Brown's (1973) classic studies of language development, he found that irregular past tense verbs developed rather early in the developmental sequence. Maddox Speech-Language Pathologist, County Superintendent of Schools, Fresno, CA Joyce E. Shipley California State University, Fresno Mary A. 1 Language, Speech, and Hearing Services in Schools, Volume 22,, July 1991 Children's Development of Irregular Past Tense Verb Forms Kenneth G.
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