Mr. Wilson usually hires students during the summer.
Usually is the adverb here.
An adverb is a word that modifies or describes another word, such as an adjective (he sings loudly), a verb (ended too fast), or even a whole sentence (Fortunately, I had brought an umbrella). Although many adverbs finish in -ly, some, like swift, appear exactly like their adjective equivalents. Adverbs frequently alter verbs. This indicates that they describe how an action is taking place.
1) While in the shower, Phillip sings aloud.
2) My cat is impatiently awaiting his meal.
Adverbs can respond to various inquiries concerning the manner of an activity. Additionally, they can provide information about the time and location (we arrived early) (Turn here).
To learn more about Adverbs here
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