Adverbs of degree: thoroughly, very, much, completely, quite, rather, a lot, a little, a great deal, badly, greatly, hardly, barely, scarcely, narrowly, just, almost, mostly, enormously, largely, tremendously, keenly, somewhat, too, so, most, all but.
Among these some are synonymous (much, very), but their combinability is different. Thus much is used to modify verbs, nouns, statives and adjectives, and very is used with adjectives and adverbs in the positive and superlative degrees, whereas with comparatives only much is used:
to travel much;
to be much improved;
much better;
much slower;
very much in love;
very much alive;
very much alike;
very much afraid
With participles, however, both much and very may be used, often they go together:
much admired, very surprised, very much amused.
Among adverbs of degree there are many the meaning of which has become weakened and which are used as intensifiers, adding emotional colouring to the content of what is said. This group of adverbs is very difficult to define because adverbs of other semantic groups can occasionally function as intensifiers:
awfully painful;
very quiet;
rather calm,
most expensive;
terribly unjust;
faintly uneasy;
extremely beautiful