问题: 动词原形的逻辑主语
求助：请问这句话中的“end up”的逻辑主语是谁？为什么用动词原型？在句中它做什么成分？
Federal agricultural programs aimed at benefiting one group whose livelihood depends on farming often end up harming another such group.
解答:
End up的逻辑主语是programs没错。Ｅnd用原型是因为programs是复数。Ａimed那一串是一个定语，修饰programs。加两个逗号可能会看得清楚些：
(Some) federal agricultural programs, which are aimed at benefiting one group whose livelihood depends on farming, often end up harming another such group.
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