Hello This is tatsu and I would like to answer some of your questions from げんきⅡ book. I`m well enough to teach that of Ⅰ but I`m not good enough for Ⅱ. In this discussion, I hope this can help you study Japanese somehow. 

Leave some comments and I try to answer as many questions as I can. (Sorry for not answering any questions that are unrelated to the book, but when I`m in need of practicess for some Japanese, I might post a discussion like this sometime.) Good luck on your journey.