Adverbs modify verbs, adjectives, or other adverbs.
The machine performed poorly. John revised the paper earlier. Linda sleeps frequently.
The staff are exceptionally competent.
John writes very well. [Very modifies the adverb well, telling to what extent
|Adverb of place||Move the throttle forward.|
|Adverb of time||Replace the thermostat immediately.|
|Adverb of degree||The nearly completed report was sent on time.|