the adverb

The adverb, the fifth part of speech, modifies (qualifies or limits) verbs,
adjectives, or other adverbs. An adverb can answer any of these four
questions—Where? When? How? To what extent?
Adverbs modify verbs:

Henry swam brilliantly. (How did Henry swim?)
The train then came down the line. (When did the train come down
the line?)

The runner fell down. (Where did the runner fall?)

Adverbs modify adjectives:

The day was almost perfect. (To what extent was the day perfect?)
Some older people were quite happy with the club’s proposal. (How
happy were they?)
Adverbs modify adverbs:

Sonny, swallow your food very slowly. (How slowly should Sonny

swallow his food?)
The architect worked quite methodically. (How methodically did the
architect work?)
Though many adverbs end with -ly, these thirty-three adverbs below
do not.

again almost alone already also
always away even ever here
just later never not now
nowhere often perhaps quite rather
seldom so sometimes somewhat somewhere
soon then there today too
very yesterday yet