They are books.book为什么加s

They are books.book为什么加s ——Whose book are these?——They`re( our )books 为什么是our? It's an english book.复数形式为什么是They are English books 为什么 He has a book.变复数为They have some books.he 变成了they 但是This is his book.变复数为These are his books.为什么his这个所有格不用变成复数their Whose books are they? They are books. Look at your__.Are they old?1.book 2.books 3.the books选哪个3选1 They are the______(twins) books. They are books 英语疑问句 This are English book.T___are chinese books 改单数句子They are English books.(改为单数句)It ＿ ＿ English book.横线内各填一个单词 They are ___(read) book ③They want to buy some book.Now they are going to the .教教我把④Many people are reading books in the . What are {this}?They are English books these are (they)books.those are (your) Are they your books?还是Are these your books?为什么? These are Chinese books.They are (we)books. they are too expensive books!___ ____ the books are