直接引语变间接引语

题目

直接引语变间接引语
She said:"I was shopping when the UFO arrived."怎么变间接引语
是变成She said that she was shopping when the UFO had arrived.
还是She said that she was shopping when the UFO arrived.
为什么?

答案

此题应该是：She said that she was shopping when the UFO arrived.
如果直接引语中含有since,when,while 引导的表示过去时间的状语从句,在变为间接引语时,只改变主句中的谓语动词,从句的一般过去时则不变.如：
He said to me,"I have taught English since he came here ."
→He told me that he had taught English since he came here.