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可尝试扩展句子。越复杂的句子,分析结果越丰富。
In the past 10 years, great changes have taken place in our school.
这是一个简单句,只含有一个主谓结构。
great changes主语
have taken place谓语动词短语(复合结构)
In the past ··· years,、in our school.