I already wrote I started study for EIKEN 3 days ago.
But yesterday I spend time for web-surfing all day long, I didn't study for EIKEN. Of course I studied (practiced) English, for example I wrote many article for my blog, and I read 2 articles on JapanTimes, and I listened to BBC radio. Just I didn't study for EIKEN.
When it changed date I woke up too early. Then I read Duo3.0 book and listened Duo3.0 CD. Duo3.0 is workbook for vocabulary. So I can't always say I didn't study for EIKEN. But I slept during listening CD.
I don't see what I want to say, but anyway I studied yesterday?