Does the sentence was a very smart have an adverb that modifies verb?

The sentence "was a very smart" is incomplete and grammatically incorrect. It's missing a noun or pronoun after "was."

However, if we complete the sentence, for example:

* "He was a very smart student."

Then, the adverb "very" modifies the adjective "smart", which in turn describes the noun "student".

Therefore, the sentence does not have an adverb modifying a verb.