“…Traditionally, such utterances have been interpreted in terms of the gradual acquisition of the relevant morphemes (L. Bloom, Lifter, & Hafitz, 1980;Brown, 1973), or the dropping of inflections as a result of performance limitations in production (P. Bloom, 1990;Valian, 1991). More recently, however, Wexler (1994Wexler ( , 1998 argued that, rather than reflecting a process of inflection drop, utterances such as those in 1 to 4 reflect children's optional use of nonfinite forms (e.g., "want," "go," "barking," "done") in contexts in which a finite form (e.g., "wants," "went," "is barking," "has done") is obligatory in the adult language.…”