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| Type | What It Tests | Strategy |
|---|---|---|
| Central Idea | Main point of passage | Read first/last sentences, look for repeated themes |
| Detail | Specific information | Locate keywords, read surrounding context |
| Inference | What's implied | Find evidence that supports conclusion |
| Vocabulary | Word meaning in context | Replace word with answer choices, check fit |
| Text Structure | How text is organized | Identify purpose of each paragraph |
| Purpose | Author's intent | Ask 'why did author write this?' |
| Rule | Example | Tip |
|---|---|---|
| Subject-Verb Agreement | The group of students IS studying | Find true subject, ignore prepositional phrases |
| Pronoun Agreement | Each student brought THEIR book → HIS/HER | Singular antecedent = singular pronoun |
| Comma Splices | I ran, I jumped → I ran, and I jumped | Two independent clauses need conjunction or semicolon |
| Modifiers | Running quickly, THE DOG caught the ball | Modifier must describe nearest noun |
| Parallel Structure | I like to run, swim, AND bike | Keep list items in same grammatical form |
"No change" is correct about 25% of the time. Don't assume there's always an error - sometimes the original is best.