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.
The predicate is the part of the sentence that contains a verb or verb phrase and its complements. English has three main kinds of verbs: auxiliary verbs, linking verbs, and action verbs. The verb to be is the most frequently used verb in English.