Morpho-syntactic features of Modern Standard Arabic mix intricately with those of Egyptian Colloquial Arabic in ordinary speech. I study the lexical, phonological and syntactic features of verb phrase morphemes and constituents in different tenses, aspects, moods. A corpus of over 3000 phrases was collected from religious, political/economic and sports interviews on four Egyptian satellite TV channels. The computational analysis of the data shows that systematic and content morphemes from both varieties of Arabic combine in principled ways. Syntactic considerations play a critical role with regard to the frequency and direction of code-switching between the negative marker, subject, or complement on one hand and the verb on the other. Morph-syntactic constraints regulate different types of discourse but more formal topics may exhibit more mixing between Colloquial aspect or future markers and Standard verbs. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]