如果你想用英语表示你去过北京，你可以说"I have been to Beijing."

这个短语是来自于动词"go"的过去完成时形式"have been"，以及名词"Beijing"。在这个句子中，"have been"用来表示过去的动作已经完成，而"to Beijing"则是指你去过北京这个城市。

下面是一些例句，你可以参考一下：

I have been to Beijing before. (我以前去过北京。)

She has been to Beijing twice. (她去过北京两次。)

He has never been to Beijing. (他从来没去过北京。)

We have been to Beijing and Shanghai. (我们去过北京和上海。)

Have you ever been to Beijing? (你去过北京吗？)

总之，如果你想用英语表示你去过北京，你可以说"I have been to Beijing."