うん、そうだね

N4 うん un yes informal, okay, all right N4 そう sou so, like that, really

N4 〜そうだ (aparência) sou da Indicates visual appearance based on observation, attaches to verb or adjective stem, means looks like it will N4 〜そうだ (ouvi dizer) sou da Indicates information heard from another source, attaches to a full sentence, means I heard that or they say that N5 〜ね ne Sentence ending particle seeking agreement, softens statement, similar to right or isnt it