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ConventionsCore

Form, Structure, and Sense

Make subjects agree with verbs, pronouns match their nouns, and modifiers attach to the right thing — even when the SAT hides the pairing.

⏱ 7 min📍 Learn first: Boundaries
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13 free resources
00:00 / 01:32

Apostrophe Rules for Plurals and Contractions

A short spoken refresher on this concept.

00:00 / 12:32

Beating SAT Apostrophe and Possessive Traps

The full lesson, worked through in depth.

Concept Snapshot

Definition
The catch-all conventions concept: subject–verb agreement, pronoun–antecedent agreement, verb tense, plurals and possessives, and modifier placement.
What the SAT tests
Choosing the form that keeps the sentence grammatically consistent, usually with distance or interrupters hiding the true pairing.
Key rule
Find the real subject by crossing out prepositional phrases and interrupters. Then match number and tense.
Most common mistake
Matching the verb to the nearest noun instead of the actual subject.
Prerequisite
Boundaries

Visual Explanation

What to picture: Find the real subject by crossing out prepositional phrases and interrupters. Then match number and tense.

A diagram for this concept is in production. Until it is ready, the worked example below shows the same relationship step by step.

Concept Mind Map

DefinitionThe catch-all conventions concept: subject–verb agreement, pronoun–antecedent agreement, verb tense, plurals and possessives, and modifier placement.
Key ruleFind the real subject by crossing out prepositional phrases and interrupters. Then match number and tense.

Form, Structure, and Sense

Conventions

Buried SubjectPrepositional phrases separate subject from verb.
Pronoun MatchA pronoun must agree with its antecedent in number.
Dangling ModifierAn opening phrase must describe the noun right after the comma.

How the SAT Tests It

Pattern

Buried Subject

Prepositional phrases separate subject from verb.

Clue: "of the…", "in the…" before the blank
Pattern

Pronoun Match

A pronoun must agree with its antecedent in number.

Clue: it/they, its/their choices
Pattern

Dangling Modifier

An opening phrase must describe the noun right after the comma.

Clue: Sentence starts with a verb-ing phrase

Worked Example

"The collection of ancient maps, letters, and navigational instruments _____ on display for the first time." Is the verb is or are?

Subject–verb agreement — but which word is the subject?
Cross out "of ancient maps, letters, and navigational instruments" — a prepositional phrase. Left: "The collection _____ on display."
"Collection" is singular (one collection, many items inside). Singular subject → singular verb.
"The collection…is on display." The plural nouns next to the blank were bait.

Try It Yourself

"Each of the observatory's twelve telescopes, including the two newest models, _____ recalibrated before tonight's meteor shower." Which choice conforms to the conventions of Standard English?

Common Traps

What students do

Letting the nearest noun choose the verb.

Why it fails

The SAT places a plural noun right before the blank on purpose — proximity feels like agreement but isn't.

Do this instead

Bracket every "of/in/with" phrase and every comma-wrapped interrupter. Whatever noun survives is the subject; agree with it alone.

Interactive Flashcards

Review deckCard 1 of 8

Four-Question Knowledge Check

4 quick questions drawn from this concept's own snapshot, patterns and traps.

Question 1 of 4. Which statement is the key rule for this concept?

Audio Lesson

Beating SAT Apostrophe and Possessive Traps

Cross-out tactics for agreement, pronouns, and modifiers.

00:00 / 12:32

12:32 · the full lesson

What to notice

Find the real subject by crossing out prepositional phrases and interrupters. Then match number and tense.

What the lesson covers

  • 0:00 The cross-out method
  • 1:30 Each, either, none
  • 2:50 Pronoun matches
  • 4:10 Practice

Study Guide and Transcript

One-page study guide

The snapshot, the key rule, the patterns and the traps, on one page.

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