The following sentence uses which principal part of the verb?

he is swimming in the deep end of the pool.

present
past
present participle
past participle

C) Present participle.

Explanation: present participle is the form of a verb, ending in -ing in English, which is used in forming continuous tenses (for example: he is eating), as a noun (for example: bad thinking), and as an adjective (for example: interesting facts). In the given sentence we can see an example of a present participle used to form a continuous tense: "he is swimming" so the correct answer is option C.

to me i think class room sitting education is better. i do online school and i have not learned a think haha. when i sit in the classroom i just sit there and kind of pay attention but still i get so far ahead in the class when im doing online i have nothing else better to do but play video games and i sit in school and learn and have friends and just actually learn. when i'm doing online i sit here listing to music and get on and and look up the answers i guess that is my fault for being a cheater. but to be honest i think sitting in the classroom is better.