Ответ:

2 I have read all of Shakespeare's plays

Wow! I have never read any of his plays but I have seen two at the theatre.

3. I have been to America.

Really? I have never been to America but I have been thirteen countries in Europe.

4. I have started a Saturday job.

I have never had a Saturday job but I have worked in the summer holidaysm

5. I have bought the new Adele CD

I have never bought a CD but I have downloaded a lot of songs.

6. My grandfather has written a blog.

My grandfather has never written a blog but he has written three books.