乃是
nǎi​shì

to be

nǎi​shì to be
  1. 乃 nǎi
    to be
    (literary) to be; refers to something being truly or certainly the case
  2. 是 shì verb
    to be
    to be; to correspond to; connects a subject to its identification, characterization, or identity

nǎi​shì actually be
  1. 乃 nǎi
    unexpectedly
    (literary) unexpectedly; to one's surprise; actually; used to express that something is contrary to what was expected
  2. 是 shì verb
    to be
    to be; to correspond to; connects a subject to its identification, characterization, or identity

nǎi​shì turn out to be
  1. 乃 nǎi
    then
    (literary) only then; not until then; used to indicate that something happens late or after a specific condition is met
  2. 是 shì verb
    to be
    to be; to correspond to; connects a subject to its identification, characterization, or identity