Have + 动词分词.
表示某件事情持续了一段时间.
“我在中国”这件事已经持续了三年,所以是have+动词分词形式
come的过去式是came
过去分词是come
I have come to China for three years.为什么不是I have came to China for three years
I have come to China for three years.为什么不是I have came to China for three years
英语人气：256 ℃时间：2019-10-01 02:22:37
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