16Hit1600
Standard English ConventionsVery hardAgreement with a gerund-phrase subject

Standard English Conventions practice question

Reading the assigned chapters before each class ____ students to take part more fully in the discussion.

Which choice completes the text so that it conforms to the conventions of Standard English?

  1. A. enablesCorrect
  2. B. enable
  3. C. enabling
  4. D. have enabled

Answer: A. enables

The subject is the whole phrase 'Reading the assigned chapters before each class', and a phrase like that — an activity — counts as one singular thing. So the verb is the singular 'enables'.

Why the other answers are wrong

B. enable
'enable' is plural. It looks tempting because 'chapters' and 'students' are nearby, but the subject is the single activity of reading.
C. enabling
'enabling' isn't a finite verb, so the sentence would have no main verb at all.
D. have enabled
'have enabled' is plural. The subject is one activity, so it needs a singular verb — and the present tense 'enables' matches 'before each class'.

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