Reexamines the morphology/functional category debate in light of empirical data drawn from a longitudinal study of two intermediate learners of French as a second language (L2). Argues that inflectional deficits--which appear as both nonfinite verbs and as other morphological errors in the interlanguage data--support neither a codependence of syntax on morphology nor gradual structure-building of L2 functional categories. (Author/VWL)