Mary was seen _ into the classroom.为什么横线上填to enter 老师说是被动语态要加to .但有的题就不是,这是什么规律呢?

Mary was seen _ into the classroom.为什么横线上填to enter 老师说是被动语态要加to .但有的题就不是,这是什么规律呢? 刚才看见老师进了教室 英语 怎么说the teacher was seen _ _ into the classroom just now. The thief was seen to ＿(溜)into the house. Mary came into the ba ras i was giong to He was seen to go into the room 这里为什么SEEN后加TO Tom ____ into the room secretiy last night.A. was seen climb B. was seen to climb C.was seen climb D. saw to be climbed要解释! Where is Mary ? She _____in the cinema an hour ago.( )A. saw B, was seen C. is seen where is MARY?she ____ in the cinema an hour agosaw sees is seen was been They was seen to come into the room by her还是Thry was seen to come by her into the room对?哪个正确 he was seen to come into the room last night 为什么用seen为了做老班布置的题.. Both Mary and I _ seen the film.A.hasB.haveC.is D.am请说出原因 ANN was seen go into the teacher's offoce just now 单项填空. Yesterday _ 8-year-old fell into the river. _ boy was I have never seen such a film _ was shown yesterday.that?as? 英语翻译he thought nobody was around,but he was in fact seen to steal into the office building. 改为被动1I saw him go into the classrom.2did he buy you the book you wanted?第一句,He was seen to go into the classsrom.he was seen go into the classroom.he was seen going into the classro0m.哪个对 it was Mary's kitchen in _ _ the big fire broke outA、which B、which C、that Amy learned French by herself when she was twenty year old同义句Amy _ _ Freanch _ _ _ _ Twenty.He is interesting in reading.=He _ _ _ reading.Mary spent all the summer at home.=Mary spent _ _ _ at home.