【例句】The little boy stood outside the door of the headmaster's room and had his heart in his mouth, afraid to go in.【误解】小男孩站在校长室门口，把心放到了嘴里，不敢进去。

【正确】小男孩担心吊胆地站在校长室门口，不敢进去。

【说明】have one's heart in one's mouth意思是“心都提到嗓子眼了”。