在英文中，“我以前吃苹果”可以用以下几种表达方式来表示：

I used to eat apples.

I would eat apples before.

I would have eaten apples.

I would have been eating apples.

这几种表达方式均使用了“used to”或“would”来表示过去的动作。

“Used to”和“would”都可以用来表示过去经常性或习惯性的动作，但有一些区别。“Used to”通常指过去的习惯性动作，而“would”则更多用来表示过去的经常性动作。

下面是一些使用“used to”和“would”的例句，希望对你有帮助。

使用“used to”的例句：

I used to eat apples every day when I was a child. (我小时候每天都吃苹果。)
She used to go running every morning. (她过去每天早上都会去跑步。)
They used to pve in the city, but now they pve in the countryside. (他们过去住在城市，但现在住在乡下。)

使用“would”的例句：

I would eat an apple every day when I was a child. (我小时候每天都会吃一个苹果。)
She would go running every morning when the weather was good. (如果天气好的话，她每天早上都会去跑步。)
They would visit their grandparents every weekend when they were young. (他们小时候每个周末都会去看望他们的祖父母。)