英语翻译One Foot In The Grave还是用这个

Not going to live
.

one foot in coffin

你如果要说一个动词，可以用dying!
如果是词组，可以用：at death's door, have one foot in the grave, giving up the ghost
希望你满意。
刚才找到了些：
dying
adjective
not likely to live much longer
at death’s doo...