1)1 where đid you went last Sunday ?
`=>` Lỗi sai là $went=>go$ ($(Wh)Did+S+Vo+O$)
2) They weren't sleep during the metting lást Monday
`=>` $weren't$ sai $=>didn't$(Công thức `(-)` của `QKĐ` : $S+didn't+Vo+O$)
3)She didn't broke the flower vase . Tom did
`=>` $broke$ sai $=>break$ (Công thức `(-)` của `QKĐ` : $S+didn't+Vo+O$)