There is some rubbish in our classroom.(改为否定句）

There is some rubbish in our classroom.(改为否定句） there is some rubbish in our classroom 改为否定句 there 横 横 rubbi There are some pictures in our classroom.改为否定句 There are four windows in our classroom.（改为否定句） There is a g There are some pictures in our classroom.改成否定句 there is computer in our classroom改为否定 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 boys in the classroom 改为否定句 There is a tree in front of our classroom.(改为否定句) there is someone in the classroom.改为否定句 急用!