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我兩個(gè)月前見過他。

誤：I have seen him two months ago.

正：I saw him two months ago.

■但是，有時(shí)為了行文的需要或使句子生動，ago可用于類似以下這樣的句子：

I had thought that he had died at least 20 years ago. 我原以為他至少在20年前就已經(jīng)去世了。

■以下句子 ago 雖然連用了動詞的“完成式”，但并不是“完成時(shí)”。如：

If she’d had the chance, she’d rather have lived 100 years ago. 如有可能，她寧愿生活在100年以前。

If I had been Jane, I’d have walked out on him years ago. 如果我是珍妮，我?guī)啄昵熬碗x開他了。