I see Kate's and Helen‘s skirts are on the sofa.对不对?名词所有格加在哪

I see Kate's and Helen‘s skirts are on the sofa.对不对?名词所有格加在哪 Sam and Amy's clothes are wet.为什么只在Amy的后面加名词所有格's? 英语翻译名词所有格 第一,两个人共同拥有一件东西,只在后者后面加's就可以了.例句 He is Kate and Tom Gina's books are everywhere - on her bed,on the sofa and und what\'s on the sofa? It's on the sofa. 名词所有格请问以s结尾的单数名词在表示所有格时,是在词尾加“'S”还是“S”? 什么名词的所有格不能加's 哪些名词不能加"'s"表示所有格? 名词所有格 复数名词以s结尾 能不能加 ’s the boy's books are on the sofa.对the boy's进行提问 Kate's books are e（）——on the desk, under the chair and on he