title: Productivity and constraints in the acquisition of the passive.
authors: S
authors: S
authors: Pinker
authors: D S
authors: DS
authors: Lebeaux
authors: L A
authors: LA
authors: Frost
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007804:Language Development / Q000502:physiology*; D008297:Male; D014706:Verbal Learning / Q000502:physiology*