Structure:

Subject + Verb + 下去

Subject + Verb + 不 + 下去

Meaning:

下去 can be used as a result complement to talk about things continuing or carrying on. Think of it as a figurative way of “keeping the ball rolling” (downhill).

Examples:

    这 个 菜 很 难吃 , 我 吃 不 下去。

    Zhè ɡè cài hěn nán chī , wǒ chī bú xià qu

    This food is disgusting. I can’t keep eating it.