logic the study of the logical properties of tense operators, and of the logical relations between sentences having tense, by means of consideration of appropriate formal systems
pretzel logicRead more in this article about some frequently asked questions and fun facts related to our definitions.
Verb Tenses: Past, Future, And Even PerfectThe six basic verb tenses are past, present, future, past perfect, present perfect, and future perfect. Verb tenses identify the time period when an action occurs. They also show relationships between events that happen at different times. The simple tenses (past, present, and future) are the most basic forms. Simple Tenses Present tense describes events happening now. It’s also useful for describing a direct action …
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012