撑不下去
chēng​bu​xià​qu

to be unable to keep going

  1. 撑 撐 chēng verb
    to prop up or maintain
    to support; to prop up; to brace; to maintain or keep something going despite difficulties
  2. 不 bu particle
    [potential]
    Used between a verb and its result to show that the action cannot achieve that result; used as the negative form of the 得 de potential construction
  3. 下去 xià​qu particle
    to continue
    Used after a verb to indicate that an action is continuing or will continue.