Are is a versatile word that has many different meanings and uses in the English language. It can be used as an auxiliary verb, a noun, or an adverb. Depending on its context, it can mean anything from “exist” to “possess” or even “happen at this time.”
As an auxiliary verb (also known as a helping verb), “are” is most commonly used with the present tense of verbs to indicate continuous action over time. For example, She is singing, They are playing basketball, and We are studying for our exams. In these examples, the main verbs (singing, playing basketball, and learning) all indicate actions happening right now but will continue until they finish whatever they were doing when you first noticed them doing it!
Are can also be used as a noun, meaning “that which exists.” For example, The sun’s warmth radiates through my window every morning–it’s one of those things that just AREs in life! Here we use “are” instead of saying something more specific like “the sun” because we want to convey how natural and ever-present this phenomenon feels without naming what it might be called, scientifically speaking.
Finally, Are may also serve as an adverb indicating possibility or probability—for instance: Are you going out tonight? Here we’re not asking if someone already started going out earlier today but rather inquiring about their plans for later tonight since there remains some uncertainty regarding whether or not those plans will come to fruition yet!
Overall then, regardless of its form, whether being utilized as a part of speech such as auxiliaries/nouns/adverbs, etc… The word “are” always serves some purpose within any given sentence structure by adding additional layers onto whatever message was initially trying to be communicated therein, thus making sure everything comes across nice & clear each & every single time =D