
This study examines the variation between children in early language development, focusing on their acquisition of the auxiliary verb. Learning auxiliary verbs and the syntactic and pragmatic functions with which they are associated is an essential component in the child's language...

Brian Richards examines variation in children's early language development, with special emphasis on the auxiliary verb. He identifies significant variation both in the age and in the stage of emergence of auxiliaries, and in the rate, style and sequence of subsequent development...