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. Author manuscript; available in PMC: 2012 Jun 13.
Published in final edited form as: Semin Speech Lang. 2009 Oct 22;30(4):234–245. doi: 10.1055/s-0029-1241722

Table 1.

Verb Morphology Measures in English

Morphosyntactic markers:

  • Regular past “-ed” auxiliary forms of “be”

  • Present third person singular

  • “-s” auxiliary “do”

  • Copula “be”

Verb morphology composite score:

  • % Correct = correct number of “-ed” + “-s” + copula “be” + auxiliary “be” + auxiliary “do” × 100

  • Obligatory contexts for “-ed” + “-s” + copula “be” + auxiliary “be” + auxiliary “do”