where are her books?如这样的句子,be的用法是什么,把are换成is又怎样?

where are her books?如这样的句子,be的用法是什么,把are换成is又怎样? these are my books.those are her books.的意思是什么? 请教英文"are" "is" "be" 的用法 what color is your book 和 what color are you books 这两个句子的be Where are the story books的单数 are的结构和用法where are...?where is...?的答语, am is are的用法.在句子中的用法. 怎样回答Where are the books? 求英语大神把下面句子换成更准确的句子:journey is a reading while you are walkin where be结构的句子中如果是并列主语那么be动词应该用is还是用are where are your books 中文意思是什么 be的用法,除is/am/are之外的