I studied Psychology last year. So did I.We didn't like the TV show. Neither did I.I went to the country for the weekend. So did I.I didn't have lunch today. Neither did I. I understood the task. So did I.We didn't hear the knock at the door. Neither did I.I was busy the whole day yesterday. So was I.We had a very good time last Saturday . So did I.I didn't learn English last year. Neither did I.She had a lot of dolls in her childhood. So did I.They were playing at home in the evening. So was I.I wasn't reading that magazine. Neither was I.He hadn't come by 10 last night. Neither did I.We had written a composition. So have I.They had been watching a film for 2 hours. So have I.She hadn't been singing since she was sick. Neither have I.