The Last SAT Punctuation Guide You’ll Need

Summary

The presenter teaches a rule-based method for solving SAT punctuation questions quickly. The central idea is to inspect the answer choices first, identify the punctuation rule being tested, and then check only the relevant parts of the sentence. Rather than relying mainly on what “sounds right,” students should look for sentence structure and understand why each existing punctuation mark is there.

The video covers how to identify independent clauses, the functions of SAT punctuation, shortcuts for common question types, and a step-by-step process for answering questions. It also works through practice examples.

1. Identifying independent clauses

For the presenter’s method, an independent clause needs a subject and a main verb, and it must not begin with a dependent-clause initiator.

• Find the subject: Identify the noun or pronoun the clause is about.
• Find the main verb: Ask what action or state the subject expresses.
• Do not mistake these for main verbs:
  • Verbs ending in -ing, such as running.
  • Infinitives, such as to run.
  • Verbs inside extra information, such as a relative clause.
  • Verbs inside a noun clause that forms part of the subject.
• Check for a dependent-clause initiator: Words such as when, although, and if can make a clause dependent. The presenter recommends treating such clauses as extra information in punctuation questions.
• Special note about “that”: The presenter says not to treat that as a dependent-clause initiator in this method. In the examples discussed, that often introduces essential information, which should not be set off by commas.

When a sentence is complex, the presenter suggests identifying its verbs and asking what the subject’s main action is. This can help distinguish the main clause from embedded information.

2. The punctuation rules

The presenter focuses on six punctuation choices or patterns:

• Colon: Use only when a complete independent clause comes before it. What follows should expand on or explain the preceding idea. A colon should not interrupt a sentence where the material before it is incomplete.
• Period: Requires an independent clause on both sides.
• Semicolon:
  • Can join independent clauses, just like a period.
  • Can separate items in a complex list when the items themselves contain commas.
• Comma plus FANBOYS: A comma followed by a coordinating conjunction—especially and or but in the presenter’s account—joins independent clauses. The presenter treats this as functioning like a period or clause-joining semicolon.
• Isolated comma: A comma without a FANBOYS conjunction is correct mainly when it separates items in a list or attaches non-essential information.
  • Non-essential information can usually be removed while leaving a complete, sensible sentence.
  • Commas mark where that information connects to the rest of the sentence. Material inserted in the middle generally needs a comma on each side; material at the beginning or end needs a comma at its point of connection.
  • The presenter emphasizes that a comma should not join two independent clauses by itself.
  • In this framework, a comma does not go immediately before that when that introduces essential information.
• Dash: Can set off non-essential information when used as a matching pair. A single dash can also work like a colon, provided a complete clause precedes it and the following material expands on that clause.

The presenter also briefly covers parentheses: they can enclose extra information, much like paired commas, and an open parenthesis generally needs a closing one.

3. Complex lists and semicolon lists

A semicolon list uses semicolons to separate items that already contain commas. The semicolons help readers see where each item ends.

To solve a semicolon-list question:

1. Look for multiple semicolons in the sentence or answer choices.
2. Confirm that the blank falls inside the list. The blank could be before the list starts or after it ends, in which case the semicolon-list rule may not apply.
3. Identify the pattern or structure of the list items. The presenter often recommends starting with the final item because its structure can be easier to see.
4. Place the semicolon where one item ends and the next begins, keeping the items parallel when appropriate.

For ordinary comma lists, the presenter notes that lists of more than two items commonly use commas between their items.

4. Answer-choice priority and shortcuts

The presenter recommends checking answer choices in this order, based on his analysis of SAT questions:

1. Colon
2. Period, semicolon, or comma plus FANBOYS—checking for a semicolon list first when relevant
3. Isolated comma
4. No punctuation

He presents this as a way to prioritize likely options, not as a substitute for checking the sentence. His probability estimates—such as claims that certain punctuation choices are often correct—are his reported observations from analyzing College Board questions and should be understood as heuristics.

Additional shortcuts:

• Title and name: If a title or category is immediately followed by a name in the same sentence—such as a profession followed by a person’s name—the presenter says there should be no punctuation between them. Read a few surrounding words to confirm that the title and name belong together.
• Paired dashes: If the sentence already contains an opening or closing dash, look for the matching dash, then verify that the material between the dashes is genuinely non-essential.
• Question marks: Check whether the sentence is actually phrased as a question. The presenter suggests looking at how it begins: for example, whether it starts with who, what, how, or an appropriate form of do. If a colon introduces the question, evaluate the wording after the colon.
• Quotation marks and exclamation marks: The presenter says not to make these the focus of SAT punctuation decisions in this approach, since the video treats them as outside the tested rules being taught.

5. Transition-placement questions

These questions ask which side of a punctuation mark should contain a transition such as however.

• First determine whether the surrounding punctuation is valid. The transition itself does not replace the need to check for independent clauses, semicolon lists, or other punctuation rules.
• Treat periods, semicolons, or comparable boundaries as separating sentences.
• Identify which two adjacent sentences the transition relates. A transition’s placement should connect the sentence containing it with the sentence before it.
• Determine the relationship expressed by the transition, such as contrast or cause and effect, and choose the placement that connects the appropriate pair of sentences.
• The presenter cautions that though and although can function as dependent-clause initiators rather than transitions. In that use, they make the clause dependent.

The presenter reports that transitions often appear before the punctuation mark in the questions he analyzed, but recommends checking the meaning rather than relying on that tendency.

6. The presenter’s solving process

1. Look at the answer choices first. Use them to identify what punctuation rule the question is testing.
2. Decide what to look for before reading the sentence. For example, if checking a period, semicolon, or comma plus FANBOYS, look for an independent clause on each side.
3. Read actively. Search for the subject and main verb rather than reading without a specific goal.
4. “Comma jump” over extra information. When commas clearly set off non-essential material, skip over that material temporarily to find the main clause.
5. Check every punctuation mark in the sentence. Make sure existing commas, semicolons, dashes, and other marks have a valid function.
6. Confirm the sentence structure before choosing. For an isolated comma, determine what non-essential information it attaches; for a semicolon, check whether the sentence contains a semicolon list.
7. Choose the answer and move on once the relevant rule is confirmed.

The presenter’s broader lesson is to build a repeatable process rather than rely on instinct alone. Practice, in his view, makes the structural checks faster and more reliable.

Speakers and sources featured

• Presenter/instructor: James Lu, identified by the video’s channel context.
• Sources referenced: SAT punctuation questions and official College Board questions. College Board is discussed as the source of test questions; no College Board representative speaks in the video.