he ___________________ (not / drink) beer very often.

The correct form of the sentence is: "He does not drink beer very often."

In this sentence, the base verb "drink" is used after the auxiliary verb "does." The structure follows the present simple tense, where we use "does not" (or "doesn't") for negative sentences in the singular third person (he, she, it).

"Does" is the auxiliary verb used for he, she, or it, and since "does" is already in the negative form, we do not add "not" to "drink." This is why we say "does not drink" instead of "does not drinks."

The adverb "very often" indicates the frequency of the action "drink" and comes at the end of the sentence, which is a common placement in English. This sentence conveys that the subject, in this case, "he," does not frequently consume beer.