Grammar can be perfect yet still sound wrong. Which everyday greeting sounds the most natural to a native speaker?

"How's it going?" sounds natural because it matches how native speakers actually greet each other in casual conversation — short, contracted, and low-effort, exactly how everyday speech tends to compress over time. Native-like fluency depends as much on this kind of idiomatic naturalness as on grammatical correctness.

"How is your condition?" and "How do you do today?" are both grammatically valid but sound stilted or medical, like a doctor's checkup rather than a casual greeting. Correct grammar doesn't guarantee a phrase is something a native speaker would ever actually say.

This gap between grammatical and natural is why textbook English can sound oddly formal to native ears — real spoken language favors contractions, shortcuts, and set phrases that grammar rules alone never fully capture.