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I have worked 和 I had worked 各自的意思

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I have worked 和 I had worked 各自的意思
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I have worked 和 I had worked 各自的意思
I have worked
是现在完成时,它表示现在为基准点,以现在以前做过的事,强调完成.比如说I have done the word.(我(现在)完成了工作)
I had worked 是过去完成时,它以过去的某一时间为基准,(一般是有上下文环境,以可能出现过去完成时,不然意思无法明确)
比如说:The second time I called you,I had done the word(我第二次打电话给你时(打电话是过去),我已经做完了工作.(工作是在打电话之前完成的)