A jewelry shop is reported in the local newspaper (to have been robbed) last night. .

Question

A jewelry shop is reported in the local newspaper (was robbed) last night. .为什么错了，答案是（to have been robbed） 为什么用to 什么结构 为什么用完成时 不是last night 吗？

Answer 1

A jewelry shop is reported in the local newspaper (to have been robbed) last night.

= It is reported in the local newspaper that a jewelry shop was robbed last night.
句型：
主语（人或物）+be +vt-ed + to -v ...
=It +be +vt-ed that 主语（人或物）+ V...
此处的be+vt-ed 中vt-ed常用：said, thought, believed, reported等
to-v： 表示将来，所以第二个句子中的V常用将来；
to be doing表示进行，所以第二个句子中的V常用进行；
to have done表示完成，所以第二个句子中的V过去式或完成式。
这里因为有个last night，所以用过去式。
如：
He is said to come
=It is said that he will come.
The boy is thought to be staying home.
=It is thought that the boy is staying home.
He is believed to have come.
It is believed that he has come.

Answer 2

不定式的完成时：to have done
表示这个动作发生在前面谓语的之前。
即：be robbed 发生在reported 之前。

希望帮到你

Answer 3

have been 这里可能想表示持续状态，就是这个店还没有从这次抢劫中恢复，如果是was听者可能认为已经没事儿了还可以去shopping。 至于用to 我找不到任何合理的理由。所以我认为的结合上下文。希望有所帮助。