Frequency Adverbs are adverbs that define how often an action
The most common way to use frequency adverbs is to placed them before the main verb, except the verb "to be".
- I always walk to school.
- Our teacher sometimes gives us homework.
When the main verb is the verb "to be", then the adverbs of frequency comes after the verb.
- The bus driver is always friendly.
- My teacher is never late for class.
Occasionally, frequently, usually, sometimes, and some other frequency adverbs can start the sentence.
- Sometimes my teacher gives us lots of homework.
- Occasionally the bus doesn't come on time.
It is possible to have frequency adverbs placed after the main verb, such as occasionally, rarely, often etc.
- Our teacher isn't sick often.
- My mother yell rarely.