“害怕得要命”常见的英文表达有：
be scared to death：这是一个非常常用的表达，形象地传达出极度害怕的状态。例如：I was scared to death when I saw the huge spider.（当我看到那只大蜘蛛时，我害怕得要命。）
be frightened out of one's wits：意思是吓得魂飞魄散，强调害怕到失去理智的程度。例如：The sudden loud noise in the dark frightened her out of her wits.（黑暗中突然传来的巨大声响把她吓得魂飞魄散 。）
be terrified out of one's mind：表示极度恐惧，几乎要失去理智。例如：He was terrified out of his mind by the ghost story.（那个鬼故事把他吓得要命。）