Benign paroxysmal positional vertigo is caused by calcium debris in the semicircular canals (canalithiasis), usually the posterior canal. Medications generally are not recommended for the treatment of this condition.
In grammar, tense is a category that expresses time reference. Tenses are usually manifested by the use of specific forms of verbs, particularly in their conjugation patterns. Basic tenses found in many languages include the past, present, and future. Some languages have only two distinct tenses, such as past and nonpast, or future and nonfuture.
simple tense. n (Grammar) a tense of verbs, in English and other languages, not involving the use of an auxiliary verb in addition to the main verb, as for example the past He drowned as opposed to the future He will drown. English Collins Dictionary-English Definition & Thesaurus.