Active:                                                                    Passive:

She writes the book.                                The book is written.

She is writing the book.                          The book is being written.

She wrote the book.                                           The book was written.

She was writing the book.                     The book was being written

She has written the book.                      The book has been written.

She has been writing the book.                       The book has being written.

She had written the book.                     The book had been written.

She had been writing the book.           The book had being written.

She will write the book.                          The book will be written.

She is going to write the book.             The book is going to be written.

She must write the book.                       The book must be written.

She should have written a book.         The book should have been written.

They say she wrote a book.                   The book is said to be written.