Have you ever been to Shanghai?

你去过上海吗？

Have you ever been to Shanghai?

你曾经去过上海吗？

Have you ever been to Shanghai.

你去过上海没。

By the way, have you ever been to Shanghai?

顺便问一下，你去过上海吗？

I hope if I ask my friends: "Have you ever been to Shanghai? Do you like Shanghai?"

我希望如果我问我的朋友们：“你去过上海吗？”你喜欢上海吗？