these变单数

these变单数 These are bedrooms.(变单数）回答 these are apples怎么变单数 These are my friends .变单数 what’re these（变单数句） these coats are yeiiow变单数形式 These boxes are brown.变单数求了快 these is a dictionary in the desk(单数变复数) 变为单数句These are eggs.变单数句 _________ __________ _________eggs.就是有s 是不是出错了？ Is that an egg?变复数 Is it a pen?做否定回答 Those are eraser.变单数 These are English books.变单数 They are Linda’s old shorts/These are my red socks.变单数句 Are these their erasers?这个句子变成单数句子还变their Are these their erasers?把这个句子变成单数句子，还变不变their These（单数形式） these的单数形式 these的单数 these的单数 these（单数）怎么+