This study has a twofold goal. First, it investigates the internal structure of words and clauses in Standard Arabic (SA), in the light of recent developments of Government and Binding Theory (GB). Second, it argues for a specific theory of typology, and proposes a particular view of how parametrization can be construed and executed. SA is a language used throughout the Arab world, in contrast to specific local dialects which are limited to a particular area. The language has a number of features which make it particularly suitable for cross-linguistic comparative morpho-syntax, as well as...