A mosquito just bit me.
Ka ga sashita.
indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and
to pierce; to stab; to prick; to stick; to thrust; to sting; to bite; to sew; to stitch; to embroider; to pole (a boat); to catch (with a limed pole); to put (a runner) out; to pick off