变为间接引语Our teacher told us ,“Hainan is in southern China.”

变为间接引语Our teacher told us ,“Hainan is in southern China.”

变为间接引语应该是：
Our teacher told us that Hainan is southern China.
从句中的谓语动词之所以还用is是因为＂海南位于中国南面＂是一种客观事实,所以仍用is.