Notice meanings.
284. Again, the meaning of words must be noticed rather than their form; for many words given above may be moved from one class to another at will: as these examples,—"He walked too far [place];" "That were far better [degree];" "He spoke positively [manner];" "That is positively untrue [assertion];" "I have seen you before [time];" "The house, and its lawn before [place]."
ADVERBS CLASSIFIED ACCORDING TO USE.
Simple.
285. All adverbs which have no function in the sentence except to modify are called simple adverbs. Such are most of those given already in Sec. 282.
Interrogative.
286. Some adverbs, besides modifying, have the additional function of asking a question.
These may introduce direct questions of—
(1) Time.