Chapter One: this chapter presents an up-to-date account of Contrastive Analysis (CA), and Error Analysis (EA). Chapter Two: this deals with the syntactic descriptions of Inflectional Phrase, (IP) in English and Syrian Arabic respectively. The descriptions of (IP) system are executed within the framework of X-bar syntax in the version outlined in Chomsky (1970 and 1986b), and Radford (1988). These descriptions focus on the various syntactic movements which take place within the maximal categories referred to as IP all of which play an important role in the formation of YIN and Wh-questions. For the sake of this study, only three types of movement will be considered - i. e. I- movement, V- movement, and Wh - movement Chapter Three: this chapter describes the syntactic movements which take place within the maximal categories referred to as Complementiser Phrase (CP) of the two languages within the same framework. The description focuses on I-to-C and Wh-movement. Chapter Four: this deals with English Small Clauses (SCs) and Syrian Verbless Clauses (VCs) also within the same framework. Chapter Five: this deals with contrasting the interrogative patterns of the two languages as identified in chapters 2,3 and 4, and with formulating predictions on the basis of the contrasts identified. Chapter Six: this highlights the methodology of the experiment conducted - i. e. data collection, design of the elicitation instruments, etc. Chapter Seven: this consists of analysing the elicited errors in the light of my predictions. it compares CA predictions with the attested errors to evaluate the success of the predictions and hypotheses. Chapter Eight: offers the discussion of disconfirmed predictions and errors irrelevant to predictions. Chapter Nine: this contains conclusions, pedagogical implications and recommendation for further research.