それが甘いんだよ。

that (indicating an item or person near the listener, the action of the listener, or something on their mind); it; that time; then; there (indicating a place near the listener); you

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

sweet-tasting; sweet; sugary; sugared; fragrant (smelling); sweet (music); lightly salted; light in salt; not spicy; naive; overly optimistic; soft on; generous; indulgent; easy-going; lenient; half-hearted; not finished properly; insufficient; not satisfactory; inadequate; loose; mild; tempting; enticing; luring

yes; yeah; uh huh; negative verb ending used in informal speech (abbr. of negative verb ending "nu"); abbr. of particle "no"; abbr. of particle "ni" (used especially when it precedes the verb "naru")

be; is; indicates past or completed action; indicates light imperative

indicates certainty, emphasis, contempt, request, etc.; used when calling out to someone; used to catch one's breath or get someone's attention; yo!