Adverbs of Indefinite Frequency

Look at these examples of adverbs of indefinite frequency:

100%   always, constantly
  usually, normally
  frequently, regularly
50% sometimes
  rarely, infrequently
  hardly ever
0% never

Adverbs of indefinite frequency mainly go in MID position in the sentence. They go before the main verb (except the main verb "to be"):

Occasionally, sometimes, often, frequently and usually can also go at the beginning or end of a sentence:

Rarely and seldom can also go at the end of a sentence (often with "very"):

See also adverbs of frequency vocabulary list