Adverb: Tell you more information or desccibe about an action verb.
1. Adverb of manner - answer the question 'How'?
e.g. : She moved slowly and spoke quietly.
2. Adverb of time - answer the question 'When'?
e.g. : She tries to get back before dark.
3.Adverb of frequency - indicatehow often something occurs.
e.g. : She often goes by herself.
4. Adverb of place - answer the question 'Where'?
e.g. : He was working here.