Generally, a person's verbal score reflects the level of the sophistication of the thinking the person is bringing to bear when answering verbal questions. So, probably, to drive your score higher, you have to notice more in the questions and increase the level of the sophistication of the thinking your are bringing to bear when answering the questions.
I realize that your practice test verbal scores are higher than your actual GMAT verbal scores, but that type of difference can exist for a variety of reasons, such as that, somehow, what you have done to prepare prepared you for the questions that appear on the GMAT Prep practice tests without your fully developing the skills you need to score in the mid 40s on the actual GMAT.
So, of course, the question becomes that of what you current move is.
Probably, to drive your score higher, you should carefully analyze both fresh practice questions and ones that you have already seen, untimed, to develop more skill in seeing everything going on in the questions. Timed practice won't do the job. Something about the way you are handling the questions has to be adjusted. You have to see more and consider the questions in more sophisticated ways, and you won't learn to do so by considering them on a timed basis.
As you analyze questions, seek to clearly and completely define what makes the incorrect choices correct and the correct answers correct. You could also analyze what the question writers have done to make incorrect choices tempting.
As you do this analysis, you have to be super self aware. To what degree are you REALLY defining why the choices are incorrect or correct, and to what degree are you coming up with vague rationalizations or gimmicky reasons for your choices?
Also, any time you don't get a question correct, consider both what you needed to see and what you needed to do differently in order to get that question correct. Did you fully analyze the choices, or did you "just go with" a choice? Did you get trapped? Why?
By being super thorough in your analysis, by learning to see more in the questions, and by taking your time and getting close to 100 percent of your practice questions correct, you'll develop the vision and logical skills you need to ensure that you score in the 40s or higher on test day.