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.
Letâs go back to the definition of a gerund for a moment. Remember that gerunds are words that are formed with verbs but act as nouns. Present participles do not act as nouns. Instead, they act as modifiers or complete progressive verbs. To find gerunds in sentences, just look for a verb + ing that is used as a noun.