彼(かの)女(じょ) kanojoは wa美(うつく)し()か()っ()た() utsukushikattaに ni違(ちが)い()な()い() chigainai。 She must have been beautiful. Literal She [topic-は] beautiful was [must be-にちがいない]. ~に違いない applied to a past predicate — inferring about a past state with strong certainty. appearance~に違いない (must be)
彼(かの)女(じょ) kanojoは wa美(うつく)し()か()っ()た() utsukushikattaに ni違(ちが)い()な()い() chigainai。 She must have been beautiful. Literal She [topic-は] beautiful was [must be-にちがいない]. ~に違いない applied to a past predicate — inferring about a past state with strong certainty. appearance~に違いない (must be)