为什么有些要加been而有些不要加?ApublichousewhichwasrecentlyboughtbyMr.IanThompsonisupforsale.Mr.Thompsonisgoingtosellitbecauseitishaunted.Hetoldmethathecouldnotgotosleeponenightbecauseheheardastrange

Question

为什么有些要加been而有些不要加?
A public house which was recently bought by Mr.Ian Thompson is up for sale.Mr.Thompson is going to sell it because it is haunted.He told me that he could not go to sleep one night because he heard a strange noise coming from the bar.The next morning,he found that the doors had been blocked by chairs and the furniture had been moved.上文里的最后几句是过去完成时,而我发现有时候不用加been的,是什么道理?加不加been都一样吗?

Answer 1

had been是is am are这些be动词的过去完成时,如果一般时态中没有be动词那就不用呀.
最后一句都是被动句the doors were blocked by chairs and the furniture was moved所以用完成时就是had been