Standard English Conventions
Four punctuation rules cover almost every grammar question on the SAT. Learn those four rules and you pick up easy points every time.
Boundaries
A clause starting with While, Although, Since, As, Because, or If is dependent and needs a comma to attach to an independent clause.
Main verbs are the primary action the subject does. -ing and to- forms are never main verbs.
If you see one dash in the passage and another in the choices, you likely need the sandwich to set off additional information.
Accuracy is king. Understand the sentence structure completely before moving on.
Form / Structure / Sense
For every verb question, you are only ever looking at the first verb of the choices.
If two answer choices are grammatically identical, they are both wrong.
"Each," "everyone," and "neither" are always singular.
For grammar, never read the passage first. Let the choices tell you exactly what rule is being tested.
Subject-Verb Agreement
First verb only. Never look at the second verb or adverbs in an answer choice.
Verbs are opposite nouns: a verb ending in "s" is singular, without "s" is plural.
There is only one objectively right answer. All three wrong choices will have a definitive grammatical flaw.
"Each" and "everyone" are strictly singular, always.