Adverbs may be divided into four general classes:

• adverbs of place
• adverbs of time
• adverbs of cause
• adverbs of manner

Adverbs of place answer the question Where?

For example

here
there
where
herein
therein
wherein
above
below
up
down
somewhere
nowhere
everywhere
away
aside
aloof
back
forth
aboard
ashore
aloft
forwards
backwards
outwards

Adverbs of time answer the questions When? How often?

For example

now
when
then
often
immediately
always
frequently
today
tomorrow
yesterday
ever
never
sometimes
lately
early
again
forever
soon
hitherto
seldom
rarely
after
ago
anon
hereafter

Adverbs of cause answer the question, For what reason?

For example

why
wherefore
therefore
then

Causal relations are commonly expressed by phrases and clauses.
Adverbs of manner and degree answer the questions How? How much? They are generally derived from adjectives denoting quality.

For example

faithfully
fairly
elegantly
so
thus
well
too
very
chiefly
quite
partly
wholly
amiss
scarcely
nearly
asunder
however
otherwise
together
just
less
much
least
enough
almost
asunder
headlong
generally
somewhat
excellently
gracefully

Modal adverbs and those adverbs that show the manner of the assertion belong to this class.

For example

verily
truly
surely
doubtless
forsooth
certainly
not
perhaps
perchance
indeed
really
haply
possibly
probably
nowise

The adverbs when, where, why, and how, if used in asking questions, are called interrogative adverbs.

For example

When did he come?

Adverbs of manner are numerous. Most of them are formed from adjectives by adding ly.

When an adjective already ends in ly, an adverb phrase is commonly used.

For example

In a lovely manner should be used instead of lonelily.

There is used as an expletive to introduce a sentence when the verb to be denotes existence. It is also sometimes used with the verbs seem, appear, come, and go.

For example

In the following sentences:
There are many men of the same opinion.
There went out a decree from Caesar Augustus.
there has no meaning.

The adverb so is often used as a substitute for some preceding word or group of words.

For example

He is in good business, and is likely to remain so.

Conjunctive Adverbs

Conjunctive adverbs are adverbs that express the adverbial relation of a dependent clause and connect it with the verb, the adjective, or the adverb that it modifies.

For example

I shall meet my friend when the boat arrives.

Comparison of Adverbs

Many adverbs, especially those denoting manner, allow comparison.

When an adjective undergoes comparison, it usually shows that two or more objects are compared. When an adverb undergoes the sample change, it shows that two or more actions or qualities are compared.

For example

James speaks more fluently than George speaks.

The following adverbs are compared irregularly.