はい、あなたの鍵です。

yes; that is correct; understood; I see; OK; okay; present; here; pardon?; what's that?; come again?; giddy-up; giddap

you (referring to someone of equal or lower status); dear (what a wife calls a husband)

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

key; lock

be; is