This dissertation offers an analysis of comparative constructions in TSL, with the goal of accounting for how TSL signers construct comparatives through the visual-gestural channel, with the hope of introducing typological implications based on this signed language research. This dissertation focuses on three main issues. The first issue is concerned with the syntactic structure of TSL comparatives. Two fundamental comparative constructions are identified: (a) comparative constructions with one verb and (b) comparative constructions with two verbs. In addition, grammatical phenomena and semantic interpretations associated with these constructions are examined; also, contrasts between these two constructions are illustrated. The second issue is concerned with the intertwined relationship between TSL comparative constructions and the structure of signing space. It is claimed that compared NP arguments have to be assigned to the right and the left of the signing space, respectively, to establish referential loci for referential purposes. Adjectival verbs to be associated with a designated referential locus are analyzed; they are found to be modified with regard to spatial association rather than with agreement patterns. The contrast between spatial association and agreement patterns are elucidated. The third issue is concerned with ways of determining the roles that NP arguments play in a comparative. In addition to adjectival verbs, it is found that TSL signers employ various strategies to define the relations of NP arguments. These strategies include scalar adverbs, 'exceed' verbs, evaluative lexical signs, and adverbs specifying the attribute being compared. These constituents can be modified to establish spatial associations with the referential loci of their intended NP arguments. The roles of NP arguments in TSL comparative constructions can be inferred by the constituents with which they are associated.