问题描述：
请帮看看这句英语He has had trouble with cars
--He has had trouble with cars.
这句英语为什么 has 的后面是 had ,英语句子中什么时候 has 的后面是跟 had
--He has had trouble with cars.
这句英语为什么 has 的后面是 had ,英语句子中什么时候 has 的后面是跟 had
问题解答：
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