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Having studied in our school for 3 years,the canteen service has changed a lot.非谓语动词错误上面这句话是非谓语动词错误,请问错在哪里?正确的是什么?

题目详情
Having studied in our school for 3 years,the canteen service has changed a lot.非谓语动词错误
上面这句话是非谓语动词错误,请问错在哪里?正确的是什么?
▼优质解答
答案和解析
has changed-------has been changed