作业帮They were doing their homework when I came in.改( 为否定句) They _ _ theirThey were doing their homework when I came in.改（ 为否定句） They _ _ their homework when I ___ in.
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/07 15:46:56
They were doing their homework when I came in.改( 为否定句) They _ _ theirThey were doing their homework when I came in.改（ 为否定句） They _ _ their homework when I ___ in.
They were doing their homework when I came in.改( 为否定句) They _ _ their
They were doing their homework when I came in.改（ 为否定句） They _ _ their homework when I ___ in.
They were doing their homework when I came in.改( 为否定句) They _ _ theirThey were doing their homework when I came in.改（ 为否定句） They _ _ their homework when I ___ in.
They( weren't )(doing ) their homework when I (came ) in.