Intensifying adverbials are concerned with the semantic category of degree. An intensifying adverbial indicates a point on an abstractly conceived intensity scale, and the point indicated may be relatively low or relatively high. Intensifying adverbials include two subsets:
1) Amplifiers: those that scale upward from an assumed norm with an enhancing effect,
2) Downtoners: those that scale downward from an assumed norm with a lowering effect. The notion of scaling up or down an imaginary intensity scale requires that the item or unit that an intensifying adverbial modifies be gradable (Quirk, et al, 1985).
 Loar, J. K. (2011). Chinese syntactic grammar: functional and conceptual principles. New York: Peter Lang.