1. Most adverbs are formed from the adjective. One adds the ending "--ly" to the adjectival form:
Some adverbs are irregular:
A. If the adjective ends with "--le," simply replace the "e" with "y":
B. The adverb corresponding to the adjective "good" is irregular:
C. Some adverbs have the same form as the adjective:
D. In general, adverbs of time and space have no corresponding adjective; the same can be said of adverbs of quantity:
When an adverb modifies a verb, it generally comes at the end of the clause (but before any prepositional phrases or subordinated clauses):
Exceptions: certain adverbs signaling the speaker's opinion, such as "probably," "undoubtedly," "surely," "certainly," etc., come at the beginning of the sentence, or else between the modal verb (or auxiliary) and the principal verb:
Adverbs of time and space generally come at the end of the sentence; however, they may be placed at the beginning of the sentence if the predicate clause is long and complicated:
Adverbs modifying adjectives or an other adverb are placed before the adjective or adverb they modify: