What does TM stand for?

MLA style: "TM." Acronym Finder . 2012. AcronymFinder.com 2 Jun. 2012 http://www.acronymfinder.com/Tense-Marker-(TM).html
Chicago style: Acronym Finder . S.v. "TM." Retrieved June 2 2012 from http://www.acronymfinder.com/Tense-Marker-(TM).html
APA style: TM. (n.d.) Acronym Finder. (2012). Retrieved June 2 2012 from http://www.acronymfinder.com/Tense-Marker-(TM).html

Tense Marker

This definition appears very rarely and is found in the following Acronym Finder categories:

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Samples in periodicals archive:

In the case of do we must admit that its use as a tense marker would have fitted very well into the analytical structure of English.

Past tense markers Historical development of verbs shows that all the verbs in Old English did not have /-ed/ ending to mark past tense.

The latter inflected form is the marker of another variety of subjunctive, not a simple preterite tense marker (Anderson 2004a: [section] 3.