the boy was standing a__the window when the bell rang.补全单词

1：The policeman asked the boy ( ) why he was standing in front of a broken widow the boy was standing a__the window when the bell rang.补全单词 The boy (standing/standed)in the office was found smoking yesterday. The boy _________ in the teachers’ office was found ____________yesterday.A.standing; smoke B.sThe boy _________ in the teachers’ office was found ____________yesterday.A.standing; smoke B.standing; smokingC.stood ; smoke D.stood ;smoking the chapel was standing room the boy is standing behindthe door The boy（ standing/stood ）in the office was found （smoke/smoking ）yesterday 分别填什么 I saw a boy ( )under the tree just now A :to stand B:standing C:stood D:was standing 选哪个? I saw a boy ____ there A.stood B.standing C.to stand D.was standing Do you know the name of the boy standing at the gate?为什么用standing The boy is standing behind the girl改为同义句 when the boy was 组成句子：found a they standing boy the door at . The boy standing there is my friend的同义句 The boy is my brother.The boy is standing at the door.合并:The boy who is standing at the door isThe boy is my brother.The boy is standing at the door.合并:The boy who is standing at the door is my brother.省略：The boy standing at the door is There is a boy ( )at the door.A.stand B.standing C.stood D.is standing The boy was monster The boy was a monster The boy standing there is a classmate of mine.boy后面为什么不加is?