早饭以后我还没吃过东西呢。

I haven't eaten since breakfast.

《牛津词典》

我从早上七点开始就没吃过东西。

I haven't eaten anything since 7:00 this morning.

youdao

多种基因表现不同，这取决于一个人在行走前是否吃过东西。

Multiple genes behaved differently, depending on whether someone had eaten or not before walking.

youdao

I don't know if I'd eat it if it were put in front of me, but anyways, I'm told that it looks something like this, that you have the custard with little fragments of plum inside.

我不知道,就算这东西曾经放在我面前，就算我吃过它，但是无论如何，但是有人告诉过我有些东西长得像这样，如同在一些小块的梅子,放在乳蛋糕里面。

麻省理工公开课 - 固态化学导论课程节选

I've never eaten the stuff.

我从来没有吃过这种东西。

麻省理工公开课 - 固态化学导论课程节选