This seminar focuses on the internal structure of words and sentences. It will serve as an introduction to the main topics and theoretical discussions in Spanish morphology and aspects of syntax. Some of the topics to be covered include noun and verbal morphology, and opaque clitics. The focus on syntax will be on the structure of the verbal phrase, case theory, and movement. The course presupposes some familiarity with formal linguistics and basic grammatical notions. This graduate course complements other graduate courses in Spanish linguistic by covering the two other core areas of grammar: morphology and syntax. It also serves as the descriptive and theoretical basis for courses on acquisition and applied linguistics.