There are some desks and chair in my class.(改为否定句)

There are some desks and chair in my class.(改为否定句) there are some desks in the room?改为否定句 There are some desks in the classroom .改为否定句,请问怎么改. There are some chairs and desks in the school hall.(改成否定句） There are some houses in my village.(改为否定句) 1.My pants is on the bed.改错 2.There are some desks and chair there are some desks in our classroom.(改否定句)there _ _ _in ou ''There are some photos on those desks''改为单数句 there are some chairs in the classroom(变成否定句)there- - -chair There are thirty students in my class.的否定句? There are some books in my schoolbag.改为一般疑问句和否定句 There are some books in my bag.（改为否定句）