Is++there++a++butterfly++in++the++sky?的复数句怎么写?

把There is a plane in the sky改成复数的句子 连词成句 a sky kite the is in there There is a plane in the sky.怎么改成否定句 There is a bird in the sky 怎么改否定句 is,in,plane,the,there,sky,a There is a bird in the sky. This is a butterfly改为复数句 There is a flag of America in the sky.改为复数句子 The kite () in the sky looks like a butterfly. there is a bird in the sky 还是 there is bird in the sky Is there a child in the room(改为复数句 ) There is a balloon in the tree 改为复数句