--_Matt._, viii, 20. "There might they see
_whence_ Po and Ister came."--_Hoole's Tasso._ "Tell _how_ he formed your
shining frame."--_Ogilvie._ "The wind bloweth _where_ it listeth, and thou
hearest the sound thereof, but canst not tell _whence_ it cometh, and
_whither_ it goeth."--_John_, iii, 8. In this construction, the adverb is
sometimes preceded by a preposition; the noun being, in fact, _understood_:
as,

"Sinks, like a sea-weed, _into whence_ she rose."--_Byron._

"Here Machiavelli's earth return'd _to whence_ it rose."--_Id._

OBS. 9.--The conjunctive adverb _so_, very often expresses the sense of
some word or phrase going before; as, "Wheresoever the speech is corrupted,
_so_ is the mind."--_Seneca's Morals_, p. 267. That is, the mind is _also
corrupted_. "I consider grandeur and sublimity, as terms synonymous, or
nearly _so_."--_Blair's Rhet._, p. 29. The following sentence is grossly
wrong, because the import of this adverb was not well observed by the
writer: "We have now come to _far the most complicated_ part of speech; and
one which is sometimes rendered _still more so_, than the nature of our
language requires."--_Nutting's Gram._, p. 38. _So_, in some instances,
repeats the import of a preceding _noun_, and consequently partakes the
nature of a _pronoun_; as,

"We think our fathers _fools_, so wise we grow;
Our wiser sons, no doubt, will think us _so_."--_Pope, on Crit._

OBS. 10.--"_Since_ is often improperly used for _ago_: as, 'When were you
in France?--Twenty years _since_.' It ought to be, 'Twenty years _ago_.'
_Since_ may be admitted to supply the place of _ago that_: it being equally
correct to say, 'It is twenty years _since_ I was in France;' and, 'It is
twenty years _ago, that_ I was in France.'"--_Churchill's Gram._, p. 337.
The difference between _since_ and _ago_ is clearly this: the former, being
either a preposition or a conjunctive adverb, cannot with strict propriety
be used _adjectively_; the latter, being in reality an old participle,
naturally comes after a noun, in the sense of an adjective; as, _a year
ago, a month ago, a week ago_. "_Go, ago, ygo, gon, agon, gone, agone_, are
all used indiscriminately by our old English writers as the past participle
of the verb _to go_."--_Tooke's Diversions_, Vol. i, p. 376. "Three days
_agone_, I fell sick."--_1 Samuel_, xxx, 13.

MODIFICATIONS.

Adverbs have no modifications, except that a few are compared, after the
m