A marine and an ornamental plant and 2 differences and 2 similaritys?

(what is a Frequency adverbs ) and( use) and( position with verb be and other verbs) and (kind of sentences) and (example)?

These help us to express the frequency with which an action is carried out but not in an exact and exact way. For example : Never (never), rarely (rarely), sometimes (sometimes), often (often), always (always). The…