Sam and Amy's clothes are wet.为什么只在Amy的后面加名词所有格's?

Sam and Amy's clothes are wet.为什么只在Amy的后面加名词所有格's? he's sam and amy's friend. Amy的名词所有格 Amy’s shoes are wet and（）t y d r i 在书上看到一句话书上说表示时间、距离的名词所有格，在单数名词后面加’s，在复数名词后面加’为什么two feet's d John is Sam and Amy's friend.是否有语法错误? This pen are Amy and Sandy's还是This pen are Amy's and Sandy's Unit 2 Amy's blue dress is wet.的意思 ___ birthday are in June.A.Amy's and John's B.Amy and john's 两题英语单词的题目你能用所给的字母组成一个单词,使句意完整吗?Amy's shoes are wet and （ ）t 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 Mary's and Amy's houses与Mary and Amy's house的区别