have one foot in the grave 一脚已踏进坟墓; 活不了多久

【例句】
That's too exciting for such an old man as me! I already have one foot in the grave!
那对我这老人家来说太刺激了吧！我已经是一只脚踏进棺材的人了！

Don't treat me as though I had one foot in the grave!
别把我看成好像是个一脚已踏进坟墓的人。