Patiently
Mr Morris
Patiently is the adverb in Mr Morris worked patiently with the new student
patiently
patiently Adverb: a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. (e.g., patiently, patient, then, there ).
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patiently
Exhaustively is the adverb in that sentence. It modifies the verb "worked" by telling how.
The adverb in the sentence is outside which modifies the verb 'worked'.
the adverb is exhaustively, an adverb is a word that describes a verb, he worked exhaustively, this is telling us how he worked
The word hard is an adverb that describes work. There is no adjective in the sentence.
eighty
The adverb in the sentence is "exhaustively". It describes how the action of working was done by the subject (my cousin).