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Form, Structure, and Sense

The Answer-Choice Diagnostic · 12 Rules

SAT R&W Standard English Conventions
92 problems · ≈ 1–2 per module
CORD — C Concept O Operation · Method R Recognition D Drill

What this chapter tests: one grammar rule per question — verb agreement, verb tense, pronouns, apostrophes, or modifier placement. The trick: look at the answer choices FIRST. Whatever varies across A/B/C/D tells you the exact rule being tested.

Know These 5 Terms

SVA (Subject-Verb Agreement)
Singular subject → singular verb (-s). Plural subject → plural verb (no -s). "He runs" · "They run"
Antecedent
The noun a pronoun refers back to. Pronoun must match its number. "The brain… it finds faces."
Prep phrase + Appositive
Strip-zones: of/in/at/with… phrases AND noun phrases between commas. Cross these out to find the bare subject. "survey of plants, a study, was…" → subject = survey
Dangling modifier
Intro phrase whose described noun isn't right after the comma. "A pioneer in taphonomy, [must be a PERSON]"
Main verb
The finite verb that's the sentence's spine. -ing and to-infinitive are NOT main verbs. "She runs" vs "running"

Foundation Rules · 1–4 · SCAN · SPOT · STRIP · SOLVE

Rule 1 SCAN the choices first

Look at A/B/C/D before reading the stem. What varies — verb form? Pronoun? Apostrophe? Whole-clause rewrite? The variation IS the rule being tested.

RecognitionReads the stem first and never compares choices to spot the tested rule.
Rule 2 SPOT the rule

Map the variation to a category: SVA · verb tense · verb form · pronoun · apostrophe · modifier placement. Bank distribution: Verbs 65% · Modifiers 14% · Apostrophes 14% · Pronouns 9%.

RecognitionAssumes agreement is tested when choices vary tense, pronouns, or modifiers.
Rule 3 STRIP the sentence

Cross out prep phrases + appositives. What's left = the bare subject. SVA + tense decisions hinge on this.

RecognitionMatches the verb to the prepositional-phrase noun instead of the bare subject.
Rule 4 SOLVE — simplest choice usually wins

Apply the spotted rule's quick test. Fancy ≠ correct — simpler choice wins ~80% of the time.

RecognitionPicks the fanciest-sounding choice when the simplest one is correct.
Quick Card · Page 1
Scan choices · Spot the rule · Strip the sentence · Solve
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FSS · Rules 5–12

Specialized Rules · category-specific traps

SAT R&W Standard English Conventions
Rules Catalog
💡 How to use this with explanations. When you review a wrong answer, the explanation will say violates Rule N. Look up that rule below to see the pattern, the example, and the quick test. Foundation Rules 1–4 are on Page 1.
Verbs are 65% of this section — Rules 5–8. Modifier placement is only 14% overall but 43% of Tier 3 problems (Rule 11). Drill those two areas first.
Rule 5 Distractor Noun (SVA) Drill 25

Long prep phrase puts a wrong-number noun between subject and verb. Strip prep phrases first — match the bare subject.

"survey of plants and species was instrumental" — subject = survey (singular)

RecognitionMatches the verb to the closest noun inside the prep phrase, not the true subject.
Rule 6 Each / Every (singular) Drill 2

"Each of X" and "Every one of X" LOOK plural but are singular.

"Each of these plays focuses" — not "focus"

RecognitionTreats 'each of' or 'every one of' as plural because the following noun is plural.
Rule 7 Elaborate Tense Drill 12

Fancy ≠ correct. "Would have / will have been measuring" almost never wins. Match the surrounding tense — usually simple present or simple past.

"measures" beats "would have measured" ~80% of the time

RecognitionChooses perfect/progressive tense when simple tense matches surrounding verbs.
Rule 8 Verb Form Mismatch Drill 17

Ask: does the sentence already have a main verb? If yes, the blank can be -ing / to-infinitive. If no, the blank MUST be finite.

No main verb → can't use "-ing"; need finite verb (premiered, developed)

RecognitionChooses an -ing or to-infinitive form when the sentence still needs a finite main verb.
Rule 9 Pronoun Match Drill 8

Match the antecedent's number, not the feel. "Brain" = it, not they. "Team" = singular collective.

"the human brain… IT will find faces" — not "they"

RecognitionUses a plural pronoun for a singular nonperson or collective noun.
Rule 10 Apostrophe Count Drill 12

Count owners. One owner = 's. Many owners = s'. No owner = no apostrophe. When all 4 have apostrophes, fewest usually wins.

"its wings" beats "it's wing's"

RecognitionAdds 'it's' or extra apostrophes when no possession or contraction is present.
Rule 11 Dangling Modifier (Tier 3 boss · 43%) Drill 16

After an intro phrase + comma, the first noun must match what the phrase describes. "A pioneer in taphonomy, [must be a PERSON]"

"A coming-of-age story, Morocco gained…" — Morocco isn't a story

RecognitionLets the intro modifier attach to the wrong noun after the comma.
Rule 12 Passive Fluff

"There is/are," "it was," wordy rewrites with extra prepositions — almost always wrong on Tier 3 sentence-structure problems. Pick concrete, active.

"two problems are associated with X" → "X has two problems"

RecognitionChooses wordy 'there is/are' or passive phrasing over a concise active verb.
Rules Catalog · Page 2
Verbs 65% · Modifiers (Rule 11) = Tier 3 boss · Fancy ≠ correct
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