问题描述：
how long did you skate?--I skated for two years.
请帮忙分析一下此句话的语法
I skated for two years.I have skated for five years两句有什么区分
请帮忙分析一下此句话的语法
I skated for two years.I have skated for five years两句有什么区分
问题解答：
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