had been found 跟had found有什么区别意思一样么?

had been found 跟had found有什么区别意思一样么? The police______Dan's bicycle.A.had been finding B.had been found C.had foundD.have been finding had been The necklace ______ unnoticed for several days before I found it.A.had laid B.had lain C.had been laying D.had been laid The police found that the house__and a lot of things___.A.had been broken in;had been stolenB.had broken into;had been stolenC.has been broken into;stolenD.had been broken into;stolenA,D两项搞不清楚 he was told by a smiling policeman that his bicycle had been found 中的had been found用了什么语法?如果是过去完成时 为什么要加been what had been done had been done. At the police station,Ted_____ by a smiling boliceman that his bycycle _____.A told ;had found B was told ;had found Chad been told; was found Dwas told; had been found为什么答案是D,ABC错在哪里? the police found the house ____ .a.had broken into b.had been broken into 该选哪个, where had she been? had been什么时态 英语翻译had been reading When he got home,he found that the house_____ and some jewelry _____.A.has broken into...has been stolenB.had been broken into...stoleC.had been broken into...had been stolenD.has been broken into...stolen The police found that the house_____and a lot of things_____.A.has broken into;has been stolenB.had been broken into;had been stolenC.had been broken into;has been stolenD.was broken into;were stolen I have already had found he found all the pictures ___ she drew had been sold out. He found he was back ____ he had been 说明理由 at last he found the man____ ____ he had been searching