from your post it is evident that your english may be slightly off-kilter.

i would suggest making an excel-spreadsheet / notebook and documenting all the verbal mistakes you make. write down what you got wrong, what is the OA, what makes the OA correct, what rule GMAC uses that makes the OA correct etc.

this will help your recall when you see those concepts again in real questions.

depending on which schools your are applying for, i would gibve this third attempt your best shot. i have heard from numerous people that >3 attempts without improvement starts to look bad.

I agree with the above. Obviously, verbal is the problem, not quant.

My advice is to take some time away from the GMAT. Instead, get some practice using English. Start reading any well written English material you can find... books, magazines, newspapers, whatever. Anything will do.

This will help you to read and analyze English passages better and to recognize good grammar.

Later, go back to the GMAT... you'll probably find that you improved.