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1·Yes, I have been there before.

是的，我以前去过那儿。

2·You may have been there before.

你以前也许去过那里。

3·He must have been there before.

他以前一定去过那。

4·They have been there before.

他们以前去过那儿。

5·I have been there before.

我以前去过那儿。

6·I have been there before.

我以前去过那里了。

7·You must have been there before, haven't you?

你以前肯定到过那里是吗？

8·But we have been there before and know what is required.

但我们有的是经验，知道冠军应当怎样。

9·He seems to know the city quite well. He may have been there before.

他似乎对那个城市很熟悉，他以前可能去过那儿。

10·My husband and I have been there before, but our 2 year old son hasn't.

我老公和我曾经去过那里，但我们两岁的儿子还没去过。