下不了臺英文怎麼說合適？？
比如：A君讓B君很下不了臺

to show somebody up in public or hang somebody dry .

hang up to dry is more doing it on purpose,

maybe you can use someone is playing the devil's advocate on something.. eg. no matter what you say, I will always have a different opinion, that makes you loose face. -- that is I am playing the devil's advocate.

Show someone up - to do something that embarrasses someone or makes them seem stupid（让人难堪，丢人现眼，与让某人下不了台的意思很相近）

hang someone out to dry - not support or help someone when he is in trouble

playing the devil's advocate - 故意唱反调

thank you all