This article deals with the study of Gulf Arabic. By the means of the Qatari Arabic Corpus elaborated by Elmahdy et al. (2014), the aim of this study is investigating a number of selected verbal prefixes and the active participle gāʕid ‘sitting’ as a progressive aspect marker in Qatari Arabic, a relatively under researched variety in the field of Arabic Dialectology. A descriptive and quantitative approach in the data collection was adopted and the validation process, throughout the whole corpus which consists of 15 hours of speech flow, provided over 600 manually-selected tokens of verbal prefixes and active participles as progressive aspect markers whose main forms and functions were discussed in the paper.