adjective
used to refer to a large quantity or amount
adverb
used to emphasize the degree or extent of something
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It is not appropriate to spend too much time on non-essential tasks during work hours.
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I don't have much energy left after a long day at work.
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I didn't have much luck finding a parking spot downtown.
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She has so much on her plate right now, it's hard for her to focus on anything else.