How is happily an adverb?

"Happily" is considered an adverb because it modifies a verb, adjective, or another adverb, describing how an action is performed or the degree to which something is true.

Here's how it works:

* Modifying a verb: "He happily accepted the award." (Describes how he accepted the award)

* Modifying an adjective: "She was happily married." (Describes the degree of happiness in her marriage)

* Modifying another adverb: "They danced happily and enthusiastically." (Describes the manner in which they danced)

It's important to note that adverbs often end in "-ly," but not always. Words like "very," "quickly," and "often" are also adverbs.

Let me know if you have any other questions!