Each of us has a book.= We each have a book.请问下那句each作同位语?

Each of us has a book.= We each have a book.请问下那句each作同位语?
Each of us has a book.= We each have a book.请问下那句each作同位语?

Each of us has a book.= We each have a book.请问下那句each作同位语?
We each have a book