NBT Sentence Construction and Grammar Flashcards

Which sentence demonstrates correct use of the subjunctive mood in a formal academic context?

Answer: The committee recommended that the proposal be reviewed before the deadline.

The subjunctive mood requires the base form of the verb ('be') after verbs of recommendation, suggestion, or requirement — not the indicative 'is', past 'was', or conditional 'would be'. This is a formal register requirement often tested in academic writing contexts.

Identify the sentence in which the dangling modifier creates an ambiguity about the subject performing the action:

Answer: Having submitted the assignment late, a penalty was applied to the student's mark.

In option B, 'Having submitted the assignment late' dangles because the subject performing the action (the student) is not the grammatical subject of the main clause — 'a penalty' cannot submit an assignment. The modifier has no logical subject to attach to, creating a dangling construction. The other options correctly match the participial phrase to the subject of the main clause.

Which of the following correctly uses a semicolon to join two independent clauses while maintaining the intended logical relationship?

Answer: The results were inconclusive; however, the research team decided to publish their preliminary findings.

Option A correctly places a semicolon between two grammatically complete independent clauses, with 'however' used as a conjunctive adverb (followed by a comma) to signal contrast. Option B incorrectly joins an independent clause to a dependent clause. Option C misuses the semicolon within a complex sentence introduced by a subordinating conjunction. Option D uses 'and' redundantly — a coordinating conjunction after a semicolon is non-standard.

In the following sentence, which revision best corrects the faulty parallel structure without altering the intended meaning? 'The new curriculum requires students to think critically, to collaborate with peers, and demonstrating initiative in self-directed projects.'

Answer: The new curriculum requires students to think critically, to collaborate with peers, and to demonstrate initiative in self-directed projects.

Parallel structure demands that all items in a series use the same grammatical form. Since the series begins with infinitives ('to think', 'to collaborate'), the third item must also be an infinitive: 'to demonstrate'. Option A consistently applies the infinitive form. Option B shifts to gerunds throughout, which changes the syntactic relationship with 'requires'. Option C mixes forms. Option D uses a colon incorrectly and still has the parallelism error.

Which sentence contains a correctly placed restrictive relative clause that does NOT require commas?

Answer: The policy that was introduced last year has already been revised twice.

A restrictive relative clause (no commas) defines or limits which specific noun is meant — it is essential to the sentence's meaning. Option B uses 'that' in a restrictive clause correctly: removing 'that was introduced last year' would leave the sentence ambiguous about which policy. Option A uses commas correctly for a non-restrictive clause (only one older sister). Option C incorrectly uses 'that' for a person — 'who' is required. Option D's commas imply a non-restrictive clause, but the intended meaning (distinguishing which students) is restrictive, making it a punctuation error.

Which sentence demonstrates an error in subject-verb agreement caused by an intervening phrase or clause?

Answer: The student, together with her tutors, have submitted the research proposal.

In option C, the grammatical subject is 'The student' (singular), not 'her tutors'. The phrase 'together with her tutors' is a parenthetical addition, not a compound subject, so it does not change the number of the subject. The verb should be 'has submitted', not 'have submitted'. Option A correctly uses singular 'was' for collective noun 'collection'. Option B correctly applies the 'neither/nor' proximity rule (verb agrees with the closer subject 'teachers'). Option D correctly uses singular 'has' after 'Each'.