My question/comment might be slightly similar to what has been mentioned before but I noticed that while I was preparing for the HSK3, I have studied the characters and their meaning only. I didn't use any books really (normally I use NPCR2 and Conversational Chinese 301) and I now I noticed that I obviously cannot really use this words on a daily basis. I don't know how they function in context. Have you ever experienced the same? I decided that from now on I will only work with the books and work on the characters for each chapter rather than simply working on the new HSK4 list. Or do you guys have other experiences? I am really looking forward to the sample sentences function in the ipad/iphone version. Cheers!