eaten是eat的什么形式

　　例句：

　　First, some basic facts about healthy eating!

　　首先，说说健康饮食的几点基本事实！

　　She went without eating for three days.

　　她三天没吃东西。

　　I don't know how you can eat that stuff!

　　我不明白你怎么能吃那种东西！

　　They ate everything that was set in front of them.

　　他们把放在面前的东西都吃光了。