Adverb Modifying Another Adverb. Adverbs often end in -ly, but some (such as fast). You could correct the sentence by saying How do you determine which adverbs can modify other adverbs (or adjectives or verbs, for that matter)?
Adjectives can modify nouns (here: girl) or pronouns (here: she). Really is the adverb modifying the adverb hard. Adverbs as modifiers occur immediately before or after the verb, and before an adjective or another adverb. (The adverb very modifies the adverb softly.) He now gets home more quickly with his new car.
I don't know; I haven't found any lists online.
Conjunctive adverbs form a separate category because they serve as.
Adjectives can modify nouns (here: girl) or pronouns (here: she). Adverbs tell us in what way someone does something. Adverbs are often used to make the meaning of a verb or another adverb stronger or weaker.