+Observe the distinction between the words _further_ and _farther_.+
Farther always refers to distance, or extent. For example:
He could go no farther that day.
We will go farther into the matter some other time.
Further means more. For example:
He would say nothing further in regard to the subject.
+Never use _good_ as an adverb+. _Good_ is always an adjective. _Well_
is the adverb form. _Good_ and _well_ are compared in the same way,
_good_, _better_, _best_, and _well_, _better_, _best_. So _better_ and
_best_ can be used either as adjectives or adverbs; but _good_ is always
an adjective. Do not say, _He talks good_. Say, _He talks well_. Note
that _ill_ is both an adjective and an adverb and that _illy_ is always
incorrect.