Form, Structure, and Sense (grammar)
What this skill is
Form, Structure, and Sense questions test grammar inside a sentence: making verbs agree with subjects, choosing the right tense or verb form, matching pronouns to the nouns they replace, forming possessives and plurals, and placing modifiers next to what they describe. The stem is "Which choice completes the text so that it conforms to the conventions of Standard English?"
Key ideas
- Find the true subject. Prepositional phrases ("of rare maps," "in the library") sit between the subject and the verb but never contain the subject.
- In an inverted sentence ("Among the fossils were two teeth"), the subject comes after the verb.
- Tense follows time clues. Dates and words like "in 1969," "currently," "by next year" set the tense.
- A pronoun must match its antecedent in number: a singular noun like "the company" takes "it/its," not "they/their."
- A modifier at the start of a sentence ("After studying the ruins, ...") must be followed immediately by the person or thing doing that action.
Formulas and rules
| Topic | Rule | Example |
|---|---|---|
| Subject-verb | Singular subject → singular verb (often ends in -s) | The list of names is long. |
| Collective nouns | team, committee, collection → singular | The committee has voted. |
| Past perfect | "had + past participle" for an action before another past action | By 1900, the canal had closed. |
| Verb forms | "has/had/was" + participle (written, gone); simple past alone (wrote, went) | She had written; she wrote. |
| Pronoun number | Match the antecedent | The museum reopened its doors. |
| Possessives | singular: city's · plural ending in s: cities' · irregular plural: children's | |
| Dangling modifier | Opening phrase must describe the subject right after the comma | Walking home, Ana saw a fox. |
Worked example 1 (easy)
The set of instructions included with the new bookshelves ______ several diagrams that show how each panel fits together.
A) contain B) contains C) have contained D) are containing
- Find the subject: "The set." Cross out "of instructions" and "included with the new bookshelves."
- "The set ___ several diagrams." A singular subject needs a singular verb.
- A, C, and D are all plural forms (they would agree with "instructions" or "bookshelves").
- B, "contains," is singular. Answer: B.
Worked example 2 (SAT-level)
Carefully restored over three years by a team of conservators, ______
A) the team returned the painting to the gallery's main hall in 2022. B) the gallery's main hall received the painting again in 2022. C) the painting returned to the gallery's main hall in 2022. D) the conservators' work was displayed in the gallery's main hall in 2022.
- The opening phrase "Carefully restored over three years" describes something that was restored.
- What was restored? The painting. So "the painting" must come right after the comma.
- A: the team wasn't restored; it did the restoring.
- B: the hall wasn't restored.
- D: "the conservators' work" wasn't restored either; the painting was.
- C puts "the painting" right after the modifier. Answer: C.
Common traps
- Agreeing with the nearest noun. In "the collection of maps ___," the verb agrees with "collection," not "maps."
- Plural-sounding singular subjects. "Each of the students," "the number of cases," and "the team" are all singular.
- Tense shifts without a reason. If the passage is in past tense and gives a past date, a present-tense verb is wrong.
- "They" for a single organization. "The company announced that they..." should be "it."
- Apostrophes on plain plurals. "Sale's increased" is wrong; it's just "sales." Use "sales'" only to show possession.
- Wrong participle. "Had wrote" and "was wrote" are wrong; use "had written."