The building is reported to down last month.A.be torn B.have been tornA为什么不可以?

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Thebuildingisreportedtodownlastmonth.A.betornB.havebeentornA为什么不可以?Thebuildingisreportedtodownlastmo

The building is reported to down last month.A.be torn B.have been tornA为什么不可以?
The building is reported to down last month.A.be torn B.have been torn
A为什么不可以?

The building is reported to down last month.A.be torn B.have been tornA为什么不可以?
因为建筑物被拆是发生在谓语动词is reported 之前, 所以用不定式的完成式to have torn
A 是一般式, 表将来的.所以不能选
不定式的完成式的形式为:
to have + 过去分词

可以改写为:
It is reported that the building was torn down last month.
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