fed

She fed the cat before leaving for work.

用法提示：fed 是 feed 的过去式，表示“喂食”。

They fed the horses hay every morning.

用法提示：fed 后接双宾语，表示“喂养”。

The machine was fed with paper automatically.

用法提示：fed 是 feed 的过去分词，用于被动语态，表示“供给”。