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

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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
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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
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

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
1.He was seen to to into the classroom.
感官动词,see,watch,hear等+宾语+ 宾补.宾补可以是两种形式,doing ,强调动作正在进行；（to）do,主动语态的时候是省略掉to的不定式,被动语态时,要还原to.

He was seen to go into the classsrom. 对
变为被动之后要加to

1. He was seen to go into the classsrom.为正确的。
see/make/let sb do sth 主动不加to,改成被动时，不定式前需加to.
He was seen going into the classroom.这句单独也是正确句子，但不符合本题要求。
2.Was the book you wanted bought(by you)?

I saw him singing in the room.改为被动句 I saw him dancing.改为被动语态 l saw him go out 改为被动语态 改为被动语态：I saw him go into the classrom.2did he buy you the book you wantedwho often takes care of the old granny i saw him go into the room（变为被动态） I saw our math teacher go into the office just now.{改为被动语态} I saw my teacher go into the classroom just now.(改为被动语态) Someone saw him swam in the lake yesterday.改为被动语态He__ __ __swim in the lake yesterday. we saw him walk into the classroom 改为被动语态 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 i saw him yesterday改为否定句 I saw him go out just now. I saw him go 什么 the classroom I saw a girl dance in the room.改为被动怎么改 I saw my teacher go in to the classroom just now.改成被动语态怎么改? We saw our teacher go into office改为被动语态 英语 被动语态与过去分词例如 I saw him being taken away 这句为什么不可以改为I saw him taken away ? 不是可以过去分词表被动吗? i saw him walk into the next room被动语态