These classes of adverbs add information to sentences regarding the time, frequency, sequence, place, direction, and distance of actions or events described.
These classes of adverbs describe the manner of occurrence of events, such as their speed, safety, or regularity, or the way that something changes or looks.
These classes of adverbs describe events or behaviors in relation to or in terms of a specific subject or field of activity, such as medicine, art, science, etc