Abstract

The correlation between Pro-drop and the nature of verbal morphology is a universal principle. This syntactic phenomenon has been parameterized on the basis of verb inflection. Rich verbal inflection has been advocated to allow pro-drop subject. On contrast, if a language structure maintains a low level of verbal morphology, pro will not be dropped. This paper comes to show that Standard Arabic (SA) is a partial pro-drop language. It has null subject even with rich verbal inflection structure. Nonetheless, the paper shows that in some forms of imperative sentence that have poor verbal inflection, but the subject is optional. On the other side, and on the basis of minimalism, pro is asserted to have features that must be checked in the course of derivation. These features are case and agreement that can be valued at Specifier-head configuration to pro. The process of checking optimally tries to draw evidence for the minimum level of morpho-syntactic features that pro in SA carries. 

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