How blue the sky is!
Nanto sora ga aoi no darou.
what; how; whatever
sky; the heavens
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
blue; green; pale; unripe; inexperienced
indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question
be; is; indicates past or completed action; indicates light imperative