We are "so" happy for you.

Happy is the adverb, is "happy" the verb it modifies?

See my last answer. Remember that adverbs modify verbs, adjectives and other adverbs.

Happy is an adjective?

Right.

He is a happy camper! :-)

The verb is "are."

Thank you for your help Ms. Sue!

You're very welcome, Linda. You seem to have a good grasp of adverbs. :-)

No, in the sentence "We are so happy for you," "happy" is not an adverb. It is an adjective that describes the subject "we." The word "so" is actually the adverb in this sentence, modifying the adjective "happy."

To identify the verb in the sentence, we can look for the action or state of being. In this case, the verb is "are" which is a form of the verb "to be." It shows the state of being of the subject "we."