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.
Verbs come in three tenses: past, present, and future. The past is used to describe things that have already happened (e.g., earlier in the day,â¦ Use this quick guide to learn how to use all tenses of a verb properly, including present perfect, past continuous, future perfect continuous, and more.