请教一个英语语法

Question

1.Is this your book?如果书是复数情况，Are these your books?对吗？
2.Is this your book?
Is that book your father's?这是你父亲的书吗？
为什么这句中的book要提在your的前面呢？第一种问法我能接受，但是第二种问法我有点疑惑，你能为我讲一下吗？

Answer 1

1.如果书是复数情况，Are these your books?对！
因为陈述句是These are your books.改成一般疑问句，将are提前。便成了Are these your books?
2 陈述句是 That book is your father's. 改成一般疑问句，将is提前。便成了Is that book your father's?

Answer 2

1. Are these your books?对

2.Is that book your father's?这是你父亲的书吗？

我们可以把这句话还原成陈述句就好理解了
那就是 That book is your father's(book).

这句话变一般疑问句。 系动词提前。就变成了
Is that book your father's

Answer 3

Are these your books?对

Is that your father's book ?也可以这样说
your father's放在后面的意思是your father's做book的后置定语

Answer 4

其实最后一句也是对的,在这里,that book是一体的,your father's是名词性所有格的意思

Answer 5

Is this your book?=Is this book yours?
同理Is that book your father's?
your father's在这里相当于第一句中的yours