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.
Definition. In English grammar, the present tense is a form of the verb that is represented in English by either the third-person singular-s inflection (for example, She laughs ) or the base form (I/You/We/They laugh ). Also called the non-past. Contrast with the past tense or preterite.