Some very common adverbs , usually answering the question How often? come immediately before the PRINCIPAL verb of the sentence: e.g. I often see him, I have often seen him. BUT they come before the verb TO BE: e.g. She is always late, you are never to come late again.
The most common adverbs of this type are: often, never, always, sometimes, generally, usually, just, almost, nearly, quite, hardly, scarcely.
Other similar adverbs are: ever, scarcely ever, hardly ever, nearly always, seldom, rarely, occasionally, frequently, already.