While the demand for Arabic classes and preparation programs for Arabic language teachers has increased, there is a notable gap in the field of linguistic research on learning Arabic as a second language. Arabic Second Language Acquisition of Morphosyntax presents a data-driven and systematic analysis of Arabic language acquisition that responds to this growing need. Based on large data samples collected from longitudinal and cross-sectional studies, this book explores a broad range of structures and acquisition issues. It also introduces new and comprehensive research, and it documents the successes and problems that native speakers of other languages, including English, Spanish, French, and Japanese, are likely to encounter in learning Arabic. By integrating previously published findings with new research, the author has created a unified and streamlined resource for teachers, teachers-in-training, linguists, Arabic textbook authors, and second-language acquisition experts.