Need some help on the Verbal

I have my test scheduled on Dec. 11th. I have done two practice test (CAT). I only scored 410 and 420. My highest verbal score was 16. very very low. .. I am struggling with the content. The most difficult questions type to me is the inference questions. I am not a native English speaker. Can anyone help me out on this? My goal for the Verbal is 35. I am studying 7 days a week, 5-6 hours a day. I did 2/3 of the OG questions. So far I have a 45-50% correct rate. I have read the Princeton and Kaplan 800 books.( some parts of Ace the GMAT as well). Since I am so close to my test day, less than 4 weeks. I really need some good suggestions on improving my Verbal skills..... Help...