"Nicely" is the adverb here as it describes how the Gorilla Monster is playing with the train. He quickly ate his breakfast. In the sentence above, the adverb 'quickly' appears before the verb 'ate'.
"Nicely" is the adverb here as it describes how the Gorilla Monster is playing with the train. He quickly ate his breakfast. In the sentence above, the adverb 'quickly' appears before the verb 'ate'.