The verbs has, have, and had are auxiliary verbs, when they are used with the past participles. (In such sentences, the adverb of frequency comes after the auxiliary verb)
Example: She has always spoken the truth.
When the verb has, have, or had are used as main verbs the adverb of frequency comes before.
Example: I always have a glass of milk before going to bed.
While asking a question the adverb of frequency always goes after the subject
Example: Do you always come so late at night?
Are you never going to learn the importance of time?
The verbs do, does, and did are auxiliary verbs only when used in questions or negatives
Example: Did you finish the project on time?
In other cases, do, does and did are normal verbs:
Example: He never does his homework for that class.