In a good way, to a high or satisfactory standard: Well is standard, neutral, and colorless, while good is emotionally charged and. See examples of well used in a sentence.
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Very much, to a great degree, or. You use well in front of a prepositional phrase to emphasize it. Insistence on well rather than good has resulted in a split in connotation:
In a good or satisfactory manner.
For example, if you say that one thing happened well before another, you mean that it.