there is computer in our classroom改为否定

there is computer in our classroom改为否定 there is some rubbish in our classroom 改为否定句 there 横 横 rubbi There are four windows in our classroom.（改为否定句） There is a g There is some rubbish in our classroom.(改为否定句） There is a tree in front of our classroom.(改为否定句) There are some pictures in our classroom.改为否定句 there is someone in the classroom.改为否定句 急用! there are two __________ (computer corner ) in our classroom There is a bee in our classroom there is a library in front of the classroom .（改为一般疑问句并作否定回答 There are some pictures in our classroom.改成否定句 There is a computer room in the building.（改为否定句）