What are adverbs of frequency?
Adverbs of frequency tell us how often something happens. Here are some examples:
always = immer
often = oft
never = nie
sometimes = manchmal
usually = für gewöhnlich
seldom = selten
You put them between the subject and the main verb. (Sie stehen zwischen dem Subjekt und dem Verb).
e.g. I always go to school at 8 o' clock.
If you use the verb "to be" in your sentence you put the adverb immediately after the verb. (Wird das Verb "to be" im Satz verwendet, so folgt das Adverb nach dem Verb).
e.g. She is usually very tired in the morning.