"Good" vs. "Well"
* "Good" is an adjective, describing a noun. It answers the question "What kind?"
* Example: "The cake is good." (Good describes the cake)
* "Well" is an adverb, describing a verb, adjective, or another adverb. It answers the question "How?" or "To what extent?"
* Example: "She sings well." (Well describes how she sings)
In responses, "good" and "well" have distinct uses:
* "Good" as a response is perfectly acceptable when someone asks about your well-being or something else.
* Example: "How are you?" "Good, thanks."
* "Well" as a response is usually used to introduce an explanation or a slightly more complex answer.
* Example: "How are you?" "Well, I'm a little tired today."
So, is it improper grammar?
It's not always improper grammar to use "good" instead of "well" in a response, but it might be grammatically less precise and could sound a bit informal.
To be extra sure, consider:
* The context of the question: If someone asks "How are you?" a simple "Good" is fine. If they ask "How's your day going?" "Well" might be more appropriate for a longer answer.
* The tone you're aiming for: "Good" can be casual, while "Well" can be more formal.
Bottom line: You can use both "good" and "well" in responses, but choosing the right one depends on the situation.