I'd have given my right arm to have been there with them.

要是当时能跟他们一起去那儿，我宁愿放弃一切。

The best information about hotels usually comes from friends and acquaintances who have been there.

有关旅馆的最佳信息通常来自曾经去过那儿的朋友和熟人。

We wouldn't have been there but for him.

要不是他，我们就不会到那里去了。

Tibet is so attractive that I have been there for quite a few times.

西藏非常吸引人，我去过那里好多次了了。

I have been there once.

我到过那儿一次。