Last post, I argued that “I’m good” is a perfectly acceptable response to “How are you?”, because the linking verb am takes an adjective, and good is an adjective. “I’m well” is a fine response as well, although I personally prefer “I’m good” as it seems to refer more to my state of mind than my state of health.
In this post, I’d like to take a little extension into the related response, “I’m feeling good”. I’m also going to talk about its darker cousin, “I’m feeling bad” and explain the difference between bad and badly in this context. Originally, I’d hoped to talk about “I’m doing good” as well, but I’m going to shunt that off to yet another post.
Let’s start with “I’m feeling good”. In short, it’s fine, and here’s why. Feel is like be in that it can be a linking verb, taking a predicate adjective that modifies the subject. When one says “I’m feeling good”, good modifies I, not feeling. Some might argue that “I’m feeling good” is ambiguous (“content” vs. “moral”), but I just don’t see it, and anyway, I’m going to show that that ambiguity isn’t a big problem.
Going deeper on the adjective point, it might seem a bit weird to say that good describes how you are, not how you feel. Let’s compare the use of a somewhat clearer adjective/adverb pair: crazy/crazily. (1a) means that I’m a bit weird, whereas (1b) is itself a bit weird:
(1a) I’m feeling crazy. [adjective, modifies me]
(1b) ?I’m feeling crazily. [adverb, modifies feel]
What makes “I’m feeling X” a more grammatically interesting structure than last post’s “I’m X” is that, unlike with be, you can modify the verb feel with an adverb. (1b) isn’t ungrammatical; it’s just uncommon. Suppose, for instance, you’ve lost your autographed Harvey Haddix baseball in a ball pit at Chuck E. Cheese’s. You dive in and start feeling around for it, but blinded by fear of losing the ball, you’re feeling crazily amongst the balls.
When you adverbially modify feel, it’s a different sense of the verb from the one that takes a predicate adjective. In “I’m feeling crazy”, the verb refers to one’s sense of interoception, one’s perception of oneself. In “I’m feeling crazily”, the verb refers to one’s sense of exteroception, one’s perception of the outside world.* (The exteroception verb sense can also take a predicate adjective, as in “gelatin feels squishy”.)
So if you’re concerned that “I’m feeling good” is ambiguous (i.e., are you moral or at ease?), you ought to fear ambiguity in “I’m feeling well” (i.e., are you talking about your intero- or exteroception?) just the same. Ambiguity is pretty unavoidable sometimes. As a result, there’s no grammatical reason not to say “I’m feeling good”, although it might not be standard depending on your age and dialect. And “I’m feeling well” is fine, too.
Moving on to “I’m feeling bad(ly)”, the standard contemporary form is I feel bad. However, I feel badly, though non-standard, is pretty common and pretty robust. In fact, at various times it has been argued to be the standard form; Charles Dod wrote a nice article in 1875 arguing that I feel badly was being used as the standard form, in order to avoid the supposedly ambiguous I feel bad. He continued by arguing that here badly was functioning as an adjective even though it looked like an adverb. His discussion raises some important points, many going beyond the mere adjective/adverb distinction:
The expression [feel badly] is needed; hence it is correct. We must allow the speaker to explain what he means, and not let the grammarians force upon him a meaning which he rejects. Let us then review our grammatical principles; if we cannot adjust the phrase to our principles, we must adjust the principles to our phrase. It is a fact, that respectable and well-educated people do say, “I feel badly.” Now let us explain the fact. We may have to widen our generalization to let this fact in; but being a fact, we cannot leave it out of view in any theory we may form. We may be sure that we have overlooked something in our analysis of the phrase, “I feel badly.”
Dod argues that feel badly is necessary because feel bad can’t mean what we want it to mean. I disagree with him there, at least in current American English, but the truth is that many people — even the educated — do use feel badly where feel bad would seem to be prescribed. This is a fact that cries out for an explanation, and merely claiming that its users don’t know their English isn’t a very good one.
Let me offer a proposal. As with “I’m feeling crazily”, feel is very strongly biased against adverbial modification in this usage, where one is reporting one’s own feelings. For instance, if I hear someone say “I feel badly”, it’s so unlikely to me that they’re complaining about the incompetence of their exteroception that I find it difficult to get that interpretation of the sentence. Pretty much the only interpretation that comes to mind is “I feel bad”, unless the context suggests that the incompetent exteroception meaning is likely. So even if you hear “I feel badly”, it’s hard to misinterpret it.
As a result, I feel badly exists in a sort of weird situation, where there is very little to suggest that it is erroneous, and a decent amount to suggest it is correct. The meaning is biased against misintrepretation, the verb can take either an adjective or adverb in different situations, bad is ambiguous (or so Dod says), and there’s a general bias to err on the side of adverbs over adjectives. Add those up, and it’s easy to expect I feel badly to be an especially persistent non-standard usage. That said, if you want to follow Educated American English, I feel bad is the better form.