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The Past Perfect Tense
每次看见 I had eaten , 你心里是否想着: 到底 have eaten 与 had eaten 有何分别?
舍么时候应用 have eaten，舍么时候又应该用 had eaten 呢?
想要区别它们，方法非常容易，只需要知道到底舍么时候应使用 Past Perfect Tense 或 Present Perfect Tense.
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Present Perfect Tense - have / has eaten
Past Perfect Tense – had eaten
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Past Perfect Tense 与 Present Perfect Tense 的分别显着，并不难区分。
在这里，我们来谈 Past Perfect Tense
Past Perfect Tense 的句子构造:
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COLUMN 3 的动词
SUBJECT + had + VERBS (COLUMN 3 ONLY)
subject = 主题
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什么是 COLUMN 3 的动词 ?
Column 0 动词 Column 2 动词 Column 3 动词
Base form verbs基本动词 Simple Past verbs简单过去式动词 PAST PARTICIPLE
take took taken
eat ate eaten
go went gone
buy bought bought
talk talked talked
do did done
has / have had had
那在舍么样的情况下，我们才使用 Past Perfect Tense 呢?
情况一: 比 Simple Past Tense 更早发生的动作
例: Michael told me that he had eaten. (麦克告诉我他已吃过了。)
以上句子的 ‘told’, 是 Simple Past Tense. 而发生在 ‘told’ 之前的动作，便是 Past Perfect Tense，也就是 had eaten.
换句话说，麦克是吃了之后 (had eaten), 才告诉 (told) 我.
had eaten 比 told 先发生！
情况二: 比 Simple Past Tense 更早发生的连环动作
例: Michael had done this type of project many times before he joined the company. (麦克在加入公司之前，做过这种 project 很多次。)
以上句子的 ‘joined’, 是 Simple Past Tense. 而发生在 ‘joined’ 之前的动作，便是 Past Perfect Tense，也就是 had done (连环性动作，发生了很多次)
换句话说，麦克是做了这种 project 很多次之后 (had done), 才加入(joined) 公司.
had
done 比 joined 先发生！
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Past Perfect Tense 我在。。之前吃过了
