【例句】He was beside himself when his wife gave birth to their first child.【误解】妻子生下第一个孩子时，他就在身边。

【正确】妻子生下第一个孩子时，他欣喜若狂。

【说明】beside oneself意思是“(由于气愤或激动等而)失去控制”、“得意忘形”。