In his article, Wearden briefly refers to language disorders as an aspect of language that could be related to time. In this commentary, the author further elaborates on this remark, and while doing so, makes a connection to still another aspect of language related to time: tense.

The article first discusses some recent work in time perception--in particular the distinction among prospective timing, retrospective timing, and passage of time judgments. The history and application of an "internal clock" model as an explanation of prospective timing performance is reviewed and contrasted with the different mechanisms needed…