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. John is Sam and Amy's friend.是否有语法错误? yesterday l went to ten park with sam and amy we.met johe park .he's sam and amy's Sam and Amy's clothes are wet.为什么只在Amy的后面加名词所有格's? Yesterday Lingling went to Sam and Amy's school.用这句话提问 he's sam and amy's friend.we bought ise creans.then we went home by bus. l went to sam and amy's school yesterday（改成否定句）答对就给财富值 Does sam and amy like pears?哪儿错了 Amy and Sam are back from London.是啥意思? Amy and Sam like bananas.Do you like bike bananas? Does sam and amy like pears?哪儿错了 Can Sam and Amy speak Chinese?(speak English) sam and amy[ fly kites i]n spring _______ _______ sam and amy do in spring?对括号内提问 数分问题求证明Exercise 8.Suppose on a recent exam,Amy received an A,Joe received a D,Megreceived a B,and Sam received an A.Let R = { Amy,Joe,Meg,Sam }10 1.PREPARATORY MATERIALLet S = {A,B,C,D,F}Let T = {A,B,D}Let f = {(Amy,A),(Joe,D),(Meg,B),( 埃米和萨姆喜欢香蕉,英语怎么说?amy and sam like bananas,还是amy and sam likes bananas埃米和萨姆不喜欢香蕉,英语怎么说? yesterday i went to the superrmarket with sam and Amy.是否语法有错误?Yesterday I went to the superrmarket with Sam and Amy.是否语法有错误？ 英语翻译Dear Daming,Yesterday I went to the park with Sam and Amy.We met John in the park.He's Sam and Amy's friend.We dought ice creams.Then we went home by bus.I ran to the bus.But I dropped my ice cream!Love,Lingling此为原文,老师叫我 英语翻译Dear DaMing :Yesterday I went to the park with Sam and Amy.We met John in the park.He’s Sam and Amy’s friend.We bought ice creams.Then we went home by bus .I ran to the bus ,but I droped my ice cream!love ,LingLing