1.中文：他在许多年前去过欧洲。

　　（误）He had been to Europe many years ago.

　　（正）He went to Europe many years ago.（在上下文没有同过去某时或某个动作相比较而表示过去的意思，不可用过去完成时，而要用一般过去时。）

2.中文：她穿着蓝色上衣，看上去很可爱。

　　（误）She was wearing a blue dress and was looking very pretty.

　　（正）She was wearing a blue dress and looked very pretty.（表示看上去的look是系动词，不用进行时。）

3.中文：我去看他们的时候他们在吃晚餐。

　　（误）They had supper when I went to see them.

　　（正）They were having supper when I went to see them.（他们在吃晚餐是在过去我去看他们的时间某一点上正进行的动作，应用过去进行时。）

4.中文：她两个月前去澳洲了，她许多年前到过那里。

　　（误）She went to Australia two months ago. She has been there many years before.

　　（正）She went to Australia two months ago. She had been there many years before.（many years before是从过去的某时之前算起的，表示过去的过去，要和过去完成时连用。）