I think nothing is impossible... but from 16 to 40 is a biiiiiiiiig step.
You should start with the basics of English: Grammar.gmat-grammar-ebook-by-gmat-club-free-this-book-will-be-102387.html
And then practice. I used Manhattan GMAT
Strategy Guides: especially the SC Guide helped me a lot!!!best-verbal-gmat-books-120308.html
In addition, you should read English texts: Books, Newspapers, everything academic.
Do you have any information about how you did on each part (SC, CR, RC)?
I do not have the OG Verbal
Book, but I guess it might be helpful and I wish I had it at home... but it is too late for me anyway
I hope to reach V40 tomorrow on my GMAT
Thank You = 1 Kudos
B.Sc., International Production Engineering and Management
M.Sc. mult., European Master in Management Candidate
#1 Official GMAT Prep 1: 530 (Q41 V21), 10/10/13
#2 Manhattan GMAT CAT 1: 600 (Q43 V30), 12/17/13
#3 Manhattan GMAT CAT 2: 640 (Q43 V34), 01/13/14
#4 Manhattan GMAT CAT 3: 660 (Q45 V35), 01/16/14
#5 Manhattan GMAT CAT 4: 650 (Q45 V34), 01/18/14
#6 Manhattan GMAT CAT 5: 660 (Q42 V38), 01/21/14
#7 Official GMAT Prep 2: 640 (Q48 V30), 01/26/14
GMAT 670 Q49 V34 AWA5 IR6 - TOEFL ibt 110