■在通常情况下 ago 只与过去时连用,而不与现在完成时连用。因为ago指的是多久以前的过去时间,而现在完成时表示的动作虽然发生在过去,但它强调的是与现在的联系或对现在的影响,因此两者不能用在一起。如:
我两个月前见过他。
误:I have seen him two months ago.
正:I saw him two months ago.
■但是,有时为了行文的需要或使句子生动,ago可用于类似以下这样的句子:
I had thought that he had died at least 20 years ago. 我原以为他至少在20年前就已经去世了。
■以下句子 ago 虽然连用了动词的完成式,但并不是完成时。如:
If shed had the chance, shed rather have lived 100 years ago. 如有可能,她宁愿生活在100年以前。
If I had been Jane, Id have walked out on him years ago. 如果我是珍妮,我几年前就离开他了。
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