Hi Saps,
I’m glad you reached out, and I’m happy to help. Although I’m uncertain of your score goal, you may find that improving from a V20 in just one month is quite difficult. Thus, you may consider waiting to take the GMAT until you have improved your GMAT verbal skills.
Since you scored a V20, you clearly lack some fundamental skills necessary for a good verbal score. Moving forward, consider using a resource that allows you FIRST to learn the concepts and strategies related to Sentence Correction, Critical Reasoning, and Reading Comprehension, and SECOND to practice with a large number of realistic questions.
For example, let’s say that you begin studying Critical Reasoning. Your first goal is to master the individual Critical Reasoning topics:Strengthen the Argument, Weaken the Argument, Resolve the Paradox, etc. As you learn each Critical Reasoning problem type, do focused practice so you can assess how well you understand the topic. If, for example, you incorrectly answer a Weaken the Argument question, ask yourself why. Did you make a careless mistake? Did you not recognize the specific Critical Reasoning question type? Were you doing too much analysis in your head? Did you skip over a keyword in an answer choice? You must thoroughly analyze your mistakes and seek to turn weaknesses into strengths by focusing on the question types you dread seeing and the questions you take a long time to answer correctly. Follow a similar process for Reading Comprehension.
Sentence Correction, on the other hand, is a bit of a different animal compared to Reading Comprehension and Critical Reasoning. There are three aspects to getting correct answers to GMAT Sentence Correction questions: what you know, such as grammar rules, what you see, such as violations of grammar rules and the logic of sentence structure, and what you do, such as carefully considering each answer choice in the context of the non-underlined portion of the sentence. To drive up your Sentence Correction score, you likely will have to work on all three of those aspects. Furthermore, your Sentence Correction performance likely has not improved because you haven’t been working on all three of those aspects. Let's discuss those aspect and how to work on them.
Regarding what you know, to be successful in Sentence Correction, first and foremost, you MUST know your grammar rules. Let's be clear, though: GMAT Sentence Correction is not really a test of your knowledge of grammar rules. The reason for learning grammar rules is so you can determine what sentences convey and whether sentences are well-constructed. In fact, in many cases, incorrect answers to Sentence Correction questions are grammatically flawless. Thus, often your task is to use your knowledge of grammar rules to determine which answer choice creates the most logical sentence meaning and structure.
This determination of whether sentences are well-constructed and logical is the second aspect of finding correct answers to Sentence Correction questions, what you see. To develop this skill, you probably have to slow way down. You won't develop this skill by spending under two minutes per question. For a while, anyway, you have to spend time with each question, maybe even ten or fifteen minutes on one question sometimes, analyzing every answer choice until you see the details that you have to see to choose the correct answer.
As you go through the answer choices, consider the meaning conveyed by each version of the sentence. Does the meaning make sense? Even if you can tell what the version is SUPPOSED to convey, does the version really convey that meaning? Is there a verb to go with the subject? Do all pronouns in the sentence clearly refer to nouns in the sentence? By slowing way down and looking for these details, you learn to see what you have to see in order to clearly understand which answer to a Sentence Correction question is correct.
There is only one correct answer to any Sentence Correction question, there are clear reasons why that choice is correct and the others are not, and those reasons are not that the correct version simply "sounds right." In fact, the correct version often sounds a little off at first. That correct answers may sound a little off is not surprising. If the correct answer were always the one that sounded right, then most people most of the time would get Sentence Correction questions correct, without really knowing why the wrong answers were wrong and the correct answers were correct. So, you have to go beyond choosing what "sounds right" and learn to clearly see the logical reasons why one choice is better than all of the others.
The third aspect of getting Sentence Correction questions correct is what you do. The main thing that you have to do is be very careful. You have to make sure that you are truly considering the structures of sentences and the meanings conveyed rather than allowing yourself to be tricked into choosing trap answers that sound right but don't convey meanings that make sense. You also have to make sure that you put some real energy into finding the correct answers. Finding the correct answer to a Sentence Correction question may take bouncing from choice to choice repeatedly until you start to see the differences between the choices that make all choices wrong except for one. Often, when you first look at the choices in a Sentence Correction question, only one or two seem obviously incorrect. It may take time for you to see what you have to see. Getting the right answers takes a certain work ethic. You have to be determined to see the differences and to figure out the precise reasons that one choice is correct.
To improve what you do when you answer Sentence Correction questions, seek to become aware of how you are going about answering them. For instance, are you being careful and looking for logic and details, or are you quickly eliminating choices that sound a little off, and then choosing the best of the rest? If you choose an incorrect answer, consider what you did that resulted in your arriving at that answer and what you could do differently in order to arrive at correct answers more consistently. Furthermore, see how many questions you can get correct in a row as you practice. If you break your streak by missing one, consider what you could have done differently that would have resulted in your extending your streak.
As with your Critical Reasoning and Reading Comprehension regiments, after learning a particular Sentence Correction topic, you will want to engage in focused practice with 30 questions or more that involve that topic. As your Sentence Correction skills improve, you’ll then want to practice with SC questions that test you on skills from multiple Sentence Correction topics.
Ultimately, if you are unable to learn and practice in the manner described above, you may consider looking for additional verbal prep resources. If you are unsure of which resources to choose, check out some reviews here on GMAT Club.
You also may find my article with more information regarding
how to score a 700+ on the GMAT helpful.
Feel free to reach out with any further questions.
Good luck!
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