Are these sheep怎么改为单数形式

Are these sheep怎么改为单数形式 These are our sheep. （改为单数句子） These are ours改为单复数形式急 These are my keys.改为否定句,改为单复数转换改为一般疑问句或提问,肯定句做回答. these are apples 改为一般疑问句怎么改 Are these your brothers 怎么改为单数形式? these flower are beautiful改为感叹句怎么改 These are my shoes.改为一般疑问句怎么改 These are American cars（ 改为特殊疑问句）怎么写? These books are new 怎么改为单数形式急! These are her friends.怎么改为否定句 These are his sisters?怎么改为一般疑问句谁先说就采纳 Are these your friends.改为单复数错了 是否定回答 These are Chinese books.怎么改为否定句?改成These ( ) ( ) Chinese books. these are books.改为特殊疑问句怎么改啊!是用these还是用they替换 they are sheep 最后一个单词改为提问部分 there are many sheep on the grassland.改为单数句 A group of _______ are eating ____ and ____ at the foot of the hill.A.sheep; grass; leaves B.sheeps; grasses; leavesC.sheep; grass; leaf D.sheeps; grass; leafs怎么选B?sheep不是单复数同形吗?sheep不是单复数同形吗？