看来,看起来and看上去can all express one kind of subjective judgement ,sometimes they can exchange, sometimes can't ,which results from their different semantic emphasis point .“看上去” more likely to manifests representation observational results, and embodies some evaluation significance ;“看来”more likely to manifests logical reasoning results, and embodies some presumed significance ;while“看起来”is between “看上去” and “看来” ,and can manifest both presumed significance and evaluation significance .