1. Adverbs of manner answer the question “How?” “In what way?”

They modify verbs or adjectives, rarely adverbs. Most of them are formed from adjectives by adding ly.

2. Adverbs of time answer the question “When?” They usually modify verbs. Thus,—

3. Adverbs of place answer the question “Where?” They usually modify verbs. Thus,—

4. Adverbs of degree answer the question “To what degree or extent?” They modify verbs, adjectives, and adverbs. Thus,—

191. Some adverbs have the same form as the corresponding adjectives.