The dissertation topic has been selected from the field of cognitive linguistics. Research from temporal semantics, cognitive science and lexical semantics is also considered. A subset of lexical material will be analyzed in its relationship to cognitive processing and conceptualization. The special focus is on aktionsarten (i.e. in different terminologies, lexical aspect or mode of action) from a contrastive vantage point (German-English). Traditionally, the analysis of temporal phenomena in language refers to tense, temporal adverbials, temporal prepositions and conjunctions and the field of aspect and aktionsart. All mentioned categories will be sketched according to their cognitive relevance. In a contrastive discussion, differences in conceptualization between different languages can be established and systematized. The dissertation hypothesizes that aspects and their lexicalized counterparts aktionsarten can be ascribed a higher cognitive relevance than other temporal categories.