+286.+ There are some adverbs which scarcely fall into any of the above
classes and cannot be said to answer any of these questions. They are
such adverbs as _indeed_, _certainly_, _fairly_, _truly_, _surely_,
_perhaps_ and _possibly_. These adverbs really modify the entire
sentence, in a way, and are used to show how the statement is
made,--whether in a positive or negative way or in a doubtful way. For
example:
_Surely_ you will not leave me.
_Truly_ I cannot understand the matter as you do.
_Perhaps_ he knows no better.
_Indeed_, I cannot go with you.
Here, these adverbs, _truly_, _surely_, _perhaps_ and _indeed_, show the
manner in which the entire statement is made; so they have been put in a
class by themselves and called +adverbs of mode+. _Mode_ means literally
_manner_, but these are not adverbs that express manner of action, like
_slowly_ or _wisely_ or _well_ or _ill_. They express rather the manner
in which the entire statement is made, and so really modify the whole
sentence.