短语含义
be on one's back 是一个英语习语，通常表示“卧床不起”、“生病无法起身”，也可引申为“处于困境中”或“被人严厉指责/催促”。
经典例句
- After the surgery, he was on his back for two weeks.
- She’s been on her back with the flu since Monday.
- My boss has been on my back all week to finish the report.
- Don’t let stress keep you on your back—take a break and recharge.
- The coach was on his players’ backs after their poor performance.
使用场景说明
该短语在口语中较为常见，具体含义需结合上下文判断：
- 若描述身体状态，通常指因病或伤而卧床；
- 若用于人际关系，则多指某人不断施压、批评或催促另一人。