eat的过去式和过去分词是什么

　　例句

　　I often eat oatmeal as breakfast.我经常吃燕麦粥当早饭。

　　Do you always eat lunch at school?你总是在学校吃午饭吗？

　　If you eat too much chocolate you'll get fat.吃巧克力太多会发胖。