bark up the wrong tree 看错目标、找错对象、基于错误判断采取行动、 攻击错了目标

【例句】
Mr.A may bark up the wrong tree if he thinks he can fool her.
如果A先生认为可以愚弄她的话，那他就认错人了。

If he thinks that I'm going to help him do the laundry，well he's barking up the wrong tree.
如果他认为我将会帮他洗衣服，那他可找错人了！