Limiting adverbs modify the meaning of verbs, etc.: [He rows well].
Interrogative adverbs are used to ask questions: [When shall you come? He asked where we were going (indirect question)].
Conjunctive adverbs introduce clauses: [We went to the seashore, where we stayed a month]. Here where is used as a connective and also as a modifier of stayed.
Conjunctive adverbs introduce the following kinds of clauses:
1. Adverbial clauses: [Go where duty calls].
2. Adjective clauses: [This is the very spot where I put them].
3. Noun clause: [I do not know how he will succeed].
Adverbs may also be classified, according to meaning, into adverbs of manner, time, place, and degree. The classification is not, however, a rigid one.
Adverbs of manner answer the question How? Most of these terminate in -ly. A few, however, are identical in form with adjectives of like meaning: [She sang very loud].
Adverbs of time answer the question When?