不以为然
bù​yǐ​wéi​rán HSK7

not to think so

  1. 不 bù adverb
    not
    Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings
  2. 以为 以為 yǐ​wéi adjectiveverb
    to use as; to regard as
    (literary) To use as, take as, or regard as; frequently appears in the structure 以 yǐ A 为 wéi B (to take A as B)
  3. 然 rán adverbconjunction
    correct
    (bound form) right; correct; so; thus; in this way; to agree or approve