bark up the wrong tree

• vi. 弄错(认错目标；错怪了人；花错精力)

例句

用作不及物动词 (vi.)

1. He had been wrong about the wolf.
   他一直错怪了这匹狼。
2. She thought I'd made the report to the police,but she was barking up the wrong tree.
   她认为我已报了警，然而她错怪了人。