Is it under the bed?变为复数句时,当中的bed是否要变为beds?为什么.

It ( ) it is in the box under the bed.填单词哇... The ball is no ,under the bed he puts it under the bed What is under the bed?It is a pair of trainers.怎么改 The ruler is under the bed.对underThe ruler is under the bed.对under the bed提问 is there a bed toy the under My toy is under the bed. What are under the bed?( ) hat and some ( ) ( ) under it. ( ) is the cat it's under the bed.A where Bwhat C who Were is the bag?It's under the bed这句话有没有错 Is it under the bed?变为复数句时,当中的bed是否要变为beds?为什么. .—Are the shoes under your bed?.—Are the shoes under your bed?—____________.A.Yes,it is B.Yes, The basketball is under the bed对under the bed提问 _______ They're under the bed._______ Is it in your backpack?Yes,here it is.And my notebooks? His basketball is under the bed对under the bed提问 These trainers are under the bed.改为单数形式This（ ） trainers is under the bed. It is under the sofa? the baswball is on the bed 对on the bed 提问.Is cindy's computeron are under the table?做否定回答.the English books are under the radio 改为否定句it is mary's notebook.改为复数