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if i had had the money last year,i would have bought the hou

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if i had had the money last year,i would have bought the house
if i had had the money last year,i would have bought the house
这句话之所以两个had,第一个had是因为if条件句从句中与过去事实相反,用had done,
第二个had是因为have money吗?还有其他情况连用两个had的吗?
第一个理解完全正确
第二个had就是因为have money这个用法
也可以说,两个had虽然形式一样,但功能不同.一个是帮助构成时态的助动词,另一个是实意动词.只要符合这个原则,两个had就会同时出现,且多用于过去完成时.例如
she had had lunch when I saw her yesterday.
the boy had had medicine when his mother came to the hospital.
供参考.
再问: 你举得这两个例子比如第一句把第二个had去掉不行吗?
再答: 不可以。因为句中的两个动作是有先后比较的,先吃饭,后见面,先吃药,后去医院,只能用过去完成时。 如果只用had lunch,时态就变成了一般过去时。