Sentence Structure

What sentence structure tests

Sentence-structure MCQs give four versions of the same sentence and ask which is grammatically correct or most stylistically sound. The four wrong options usually contain one of three errors: a misplaced modifier, a parallelism break, or a run-on or fragment.

Misplaced and dangling modifiers

A modifier must sit next to the word it modifies. Wrong: "Walking down the street, the trees looked beautiful." The trees were not walking. Right: "Walking down the street, I thought the trees looked beautiful." UHS loves this trap because the wrong sentence sounds fluent until you parse it.

Parallelism

Items in a list must share the same grammatical form. Wrong: "She likes swimming, hiking, and to read." Right: "She likes swimming, hiking, and reading" — three gerunds. With paired conjunctions (not only ... but also, either ... or, both ... and), the structure on each side must match exactly.

Run-ons, comma splices, and fragments

A run-on stitches two independent clauses without punctuation: "I studied I passed." A comma splice uses only a comma: "I studied, I passed." The fix is a semicolon, a full stop, or a conjunction: "I studied, so I passed." A fragment lacks a subject or verb: "Because she was tired." That is a dependent clause, not a sentence.

Active versus passive voice

UHS does not penalise the passive voice when the agent is unknown or unimportant ("The patient was admitted at noon"). However, when both options are grammatical, UHS usually prefers the more concise active version. If the active and passive options are both correct, pick active.

Common traps

Wordy options are rarely correct. If three options say the same thing in five words and one says it in twelve, eliminate the long one. Double negatives ("cannot hardly") are always wrong. Subject-verb disagreements hidden by intervening phrases are a UHS staple: "The list of students isposted" — the subject is "list", not "students".