GMAT Sentence Correction: Tips

Sentence Correction is one of the three sections in GMAT ® Verbal Part. The various questions in GMAT Sentence Correction can be broadly grouped in to 11 types. At times, you might encounter a different type of question(s) from the types given below.


GMAT SC: Question Types


  • Meaning
  • Concision
  • Pronouns
  • Modifiers
  • Parallelism
  • Punctuation
  • Comparisons
  • Verbs and Tenses
  • Idiomatic Expressions
  • Subject-Verb Agreement

  • GMAT ® Official Guide SC Qustions

    Source: GMAT Official Guide 2018

    Graduate Management Admission Council ®

    OG 2018 Question No: 668



    In a review of 2000 studies of human behavior that date back to the 1940's, two Swiss psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size, none could be taken seriously.


    (A) psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size,

    (B) psychologists, declaring that most of the studies failed in not controlling for such variables like social class and family size, and

    (C) psychologists declared that since most of the studies, having failed to control for such variables as social class and family size,

    (D) psychologists declared that since most of the studies fail in controlling for such variables like social class and family size,

    (E) psychologists declared that since most of the studies had failed to control for variables such as social class and family size,


    Explanation


    When solving GMAT Sentence Correction Qustions, you should begin with grouping the Options

  • In the given sentence, Options A and B (one gruop) start with a subject, follwed by a present participial modifier-"declaring that".In Option A, the subordinate clause-"since most of the studies had failed to control for such variables as social class and family size"- is followed by a main clause-"none could be taken seriously". However, the Main Subject- " Swiss psychologists" does not have a verb.
  • In Option B also, the subject "Two Swiss psychologists" does not have a verb.Hence, Options A and B are eliminated.

  • Now, let us analyze the remaining options.

  • Options C, D and E start with a Subject follwed by a Verb.
  • Now, let us regroup these three options. In other words, we look for major differences in the remaing options.
  • In Option C, the subordinate clause does not have a stand alone (complete) verb.
  • In Option D, the verb in the subordinate clause "Fail" is in the present tense.
  • Finally Option E is the Best Option

  • The Strucure of the Best Sentence:

  • The sentence begins with four Modifiers: Three Prepositional Phrase-"In a review", "of 2000 studies", and "of human behavior"- and a Relative Clause-" that date back to the 1940's"
  • Then, the subject-verb follows. That is "Two Swiss psychologists declared that"
  • Then, a subordinate clause follows. That is: "since most of the studies had failed to control for variables such as social class and family size, "
  • Finally, a main clause is at the end of the sentence. That is "none could be taken seriously"

  • More Strtegies and tips for each GMAT ®SC Question Type to follow...

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