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 tell us the time that an action in a sentence happened. The time that a verb shows is called tense. The most common tenses in the English Language are past tense, present tense and future tense. We usually make the past tense by adding d or ed to the verb root word.