it is a book.这里的it is构成主谓关系吗?

it is a book.这里的it is构成主谓关系吗? i'm sorry,but that's a reference book,you can't check it out.这里的check it out A:：Where is your science book?B：Oh,no!I forget ---it to school.这里的空该填to bring还是to take This is a book.I bought it.改为宾语从句 She asked me if I knew( ) A.whose book it is.B.whose book is it C.whose book it was.D.whose book wa Is it a book?回答可以为 It’a book 应该是I thought that it is a good book. 还是I thought that it was a good book 还是都行? She asked me if I knew ( ).A、whose book it isB、whose book is itC、whose book it wasD、whose book was it I think it is an intersting book的否定句 i have a book,the cover of which is blue.Which为什么不可以变成it啊,it不可以指代前面的book吗? It is ____ useful book.I borrowed it yesterday. Where is [ ] book?I can it find it. a:what is ( ) b:it a ( ) a:( ) book is it?b:it is () english book b:it is It is so interesting a book的同义句 what is it for?it is for a book. ( ) is a pencil.Look!It's over there.这里是填this还是that?( ) is amy book.The book is here.这里是填this还是that? O_____ ,it is a useful book 给‘‘It is a English book’’改错