This study investigates the syntactic and semantic properties of three grammaticalized aspectual markers in Urban Jordanian Arabic (UJA): the particle ʕam, the active participle ʕammal, and the active participle ʔaaʕid. While traditionally perceived as markers of progressive aspect with identical semantics, this study distinguishes itself by unveiling significant syntactic and semantic differences among the three markers. In particular, the study shows that ʕammal functions as an inceptive aspect marker, ʕam marks immediate aspect, and ʔaaʕid signals durative aspect. The study provides evidence for this categorization by showing that the markers can co-occur in the same sentence. Such co-occurrence highlights a hierarchical order among the three markers, with ʕammal merging at the highest position, ʔaaʕid merging at an intermediate position, and ʕam situated at the lowest position. To capture this hierarchy, a fine-grained aspectual system is proposed, where each marker heads its own aspectual projection. Evidence from word order and agreement is provided to support this view. The findings of this study align with Cinque's (2006) theory, illustrating diverse progressive aspectual heads that merge at different levels in the extended verbal projection.
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