“据说在那个湖底发现了一个古城的遗迹”一句中从句中用was found,has been found还是had been

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“据说在那个湖底发现了一个古城的遗迹”一句中从句中用was found,has been found还是had been found?为什

It is said that an ancient city ruins has been found at the bottom of the lake.
如果前面是 It is said ,是现在式 ,表示现在在讨论一个谣传,那就用has been found.
如果是叙述一种事情,当时用的是描述的方式,前面是 It was said ,是过去式 ,表示讲述的一个当时的谣传,那就用had been found.总之这个完成式要取决于前面句子的时态,只比前面用的差一个阶段就可以了.
如果还是不明白,

“据说在那个湖底发现了一个古城的遗迹”一句中从句中用was found,has been found还是had been 定语从句的问题He found he was back ---he had been.A.where为什么选A,为什么不 tom found that he was back__he had been 1.He found he was back ____ he had been. had been found 跟had found有什么区别定语从句Her bag ,（）she put all her books,has not been found 括号中 He found he was back__he had been.A.where B to which C in wh I soon found that the work I was doing had already been done Since new China was found,he had been looking forward to ret i soon found that the work i was doing had akready been done He found he was back ____ he had been 说明理由 the report that the missing plane has been found was untrue