ADVERBS are _added to Verbs_ and Adjectives to denote some modification
or circumstance of an action or quality: as, the manner, order, time,
place, distance, motion, relation, quantity, quality, comparison, doubt,
affirmation, negation, demonstration, interrogation.
In English they admit of no Variation; except some few of them, which
have the degrees of Comparison: as,[40] “often, oftener, oftenest;”
“soon, sooner, soonest.”
An Adverb is sometimes joined to another Adverb to modify or qualify its
meaning; as, “very much; much too little; not very prudently.”