[subject] + always/usually/often/sometimes/never + [verb]
[subject] + am/is/are + always/usually/often/sometimes/never
These words answer the question How often? Here they are from most to least:
They go before the main verb.
With be (am, is, are), they go after it.
With don't, doesn't, can and other helping verbs, they go between the helping verb and the main verb.
Sometimes, usually and often can also start the sentence.
Never already means "not". Use it with a positive verb, not with don't.
Longer phrases like every day, once a week (one time) and twice a month (two times) usually go at the end.