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I have climbed that hill many a time when i was young

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I have climbed that hill many a time when i was young
i had climbed that hill many a time when i was young
请问上面这两句话有什么区别
john told me this morning that the painters haven't finished the work on his house yet
请问上面这句话中the painters haven't finished 不是应该用the painters hadn't finished吗?
I have climbed that hill many a time when i was young
i had climbed that hill many a time when i was young
两句都对
1.两句话的区别在于,完成“爬山”这个动作的时间不同,第一个句子表示现在还会爬那座山,第二个句子表示,以前年轻的时候爬过很多次,但是现在已经不去爬山了;
2.从句中可以使用这种时态,表示一种事实状态,也就是说到说话的“现在”为止都还没完成动作.例如:john told me this morning that the sun rises in the east.这个从句里用一般现在时,表示真理状态.
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