(seen)to entered the room ,he was asked to the policeman.为什么不是having been seen?

He was seen to have entered the room.啥意识 (seen)to entered the room ,he was asked to the policeman.为什么不是having been seen? 高中英语Mr. Write was seen ( )the palace museum. A.enter B.to enter C.entered Dto have entered,B or D? the boy entered the room ____ 选not seen 还是without being seen the thief was seen ()the house.so the police came quite soon and.1 to enter 2 entered 选哪个?为什么 The idea never entered my head once.为何不能把entered改成entered into或entered to? that man was seen( )that houseA.enter b.entered C.to enter D.entering entered后面加up/down/to还是/entered（ ） the house 加up/down/to还是/ the missing boys were last seen _____ the Net Bar.A.enter B.entering C.to enter D.entered哪 个对呢?B还是C?为什么,有的说的不对，怎么会be seen 只能加doing 和do?不对，应是be seen to 谁还有高见，快说说 they were seen to come out of the housewere seen he ____ the kitchen to find something to eat. A come into B entered into C came D entered He was seen to cross the street. The sun can _______ in the east.A.be seen rise B.be seen to be risen C.be seen to be rising D.be seen to rise to the front entrancend entered the officelimes were expandingderation not the beauty of turning to the little gratednd entered the officelimes were expandingreceived the grace turning to the little gratednd entered the officelimes were expandingreceived the grace 关于过去分词 ______the room,the nurse found the tape-recorder _____.A.Entering,stealingB.Entering,goneC.To have entered,being stolenD.Having entered,to be stolenB 为什么? The children _______ basketball in the playground sometimes.A.were seen playB.were seen to playC.have seen to play D.have seen play