there are some flowers in the classroom.改否定

there are some flowers in the classroom.改否定 there are some flowers in the room.改否定 There are some flowers in the park.改否定句 There are some desks in the classroom .改为否定句,请问怎么改. some students are in the classroom 改否定句 There are some students in the classroom (改为否定句) There are some plants in the classroom 改为否定句 改为否定句 There are some students in the classroom. There are some students in the classroom.否定句 There are some boys in the classroom 改为否定句 英语否定句怎么改There are some chairs in the classroom变为否定句有急用,拜托拜托! Are there some children in the classroom?怎么改错误