eat in class(改为否定句)

EAT IN CLASS ,PLEASE(改为否定句） eat in class 改为否定句怎么改 drink ang eat in the classroom改为否定句 You must eat in the classroom 改为否定句 Drink and eat in the ciassroom改为否定句 Please eat in the dining hall 改为否定句 Eat in the computer room.(改为否定句） speak chinese in class(改为否定句)怎么改 Please be quiet in class .（改为否定句） I am in Class Ten,Grade One改为否定句 they are in class eleven 改为否定句怎么改 1.he is in class four 改为否定句