我2年前去过香港．英语怎么说

I went to HongKong two years ago.

I have been to HK two years before.
楼上的， ago和完成时不能同时用

I've gone to HongKong 2 years ago.

表时间点不能用been,要用gone

我2年前去过香港
I went to HONGKONG two years ago.
我已经去过香港了
I have been to HONGKONG.

I've been to HongKong 2 years ago.