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general::
Phrase(s): never would have guessed
1. never would have thought something to be the case. (Not used in other tenses.) • He was the one who did it? I never would have guessed. • I never would have guessed that he wanted the job. He kept it a very good secret. 2. knew it all the time because it was so obvious. (Sarcastic. Not used in other tenses.) • I never would have guessed that he wanted the job. He only begged and begged for it. • Now she wants to go back home? I never would have guessed! She has been homesick for days.
McGrawhill's American Idioms And Phrasal Verbs