This book investigates the acquisition of sociolinguistic knowledge in the early elementary school years of a Mandarin-English two-way immersion program in the United States. Using ethnographic observation and quantitative analysis of data, the author explores how input from teachers and classmates shapes students' language acquisition. The book…

Variation in verbal morphology is a phenomenon which has been the object of linguistic research for a long time. Two competing sets of predictions have been put forth to account for the distribution of verbal inflections in learner language: The Aspect Hypothesis posits that learners predominantly use inflections to indicate categories of lexical…