Clauses
Although the research team expected clear results, the data remained inconsistent.
What type of clause is the opening phrase?
Dependent clause. “Although” makes it unable to stand alone.
The team tested the prototype, it failed under pressure.
Name the error.
Comma splice: two independent clauses joined only by a comma.
The experiment was repeated several times; the results remained unchanged.
Is the semicolon correct?
Yes. Both sides are independent clauses.
The class needed three materials ___ notebooks, pencils, and calculators.
A. , B. ; C. : D. no punctuation
C. Colon. The first part is an independent clause introducing a list.
Although early maps were inaccurate ___ they shaped later exploration.
A. ; B. , C. : D. no punctuation
B. Comma after introductory dependent clause.
The gallery closed early; because attendance was low.
Why is the semicolon wrong?
“Because attendance was low” is dependent, and semicolons link two independent clauses.
Fix it two ways:
The team tested the prototype, it failed under pressure.
The team tested the prototype, but it failed under pressure. / The team tested the prototype; it failed under pressure.
The experiment was repeated several times; and the results remained unchanged.
What is wrong?
A semicolon does not need a FANBOYS conjunction after it. Use a comma + and or a semicolon alone.
The class materials included: notebooks, pencils, and calculators.
Why is the colon wrong?
The words before the colon are not a complete independent clause.
The early maps were inaccurate ___ they shaped later exploration.
A. , B. ; C. because D. no punctuation
B. Semicolon. Both sides are independent clauses.
After the storm passed, the streets flooded quickly.
Explain why the comma is correct.
A dependent clause comes before an independent clause, so a comma separates them.
The musician practiced for months, however, the audition still felt intimidating.
What punctuation is needed before “however”?
A semicolon or period before “however.”
Which is correct?
A. The archive was damaged; many documents were lost.
B. The archive was damaged; because many documents were lost.
C. The archive was damaged; but many documents were lost.
A. Semicolon between two independent clauses without a conjunction.
The novel’s narrator—a skeptical observer of village life—often questions the town’s traditions.
What do the dashes mark?
A nonessential element.
The early maps were inaccurate ___ but they shaped later exploration.
A. , B. ; C. : D. no punctuation
A. Comma + FANBOYS.
Although the method was expensive ___ it produced more reliable data.
A. ; B. , C. : D. —
B. Comma. The first clause is dependent because of “Although.”
Which is correct?
A. The book was dense, but fascinating.
B. The book was dense but fascinating.
C. The book was dense, but, fascinating
B. “Dense” and “fascinating” are not independent clauses; no comma is needed.
Rewrite with semicolons for clarity:
The speakers came from Albany, New York, Austin, Texas, and Portland, Maine.
The speakers came from Albany, New York; Austin, Texas; and Portland, Maine.
Which is best?
A. The discovery led to: new questions about migration.
B. The discovery led to new questions: about migration.
C. The discovery led to a new question: how did the species migrate so far?
C. A complete clause introduces an explanation.
The early maps, which contained several major errors ___ still shaped later exploration.
A. , B. ; C. : D. no punctuation
A. The nonessential “which” phrase needs a closing comma.
The first edition of the novel, published anonymously in 1818 ___ became a major influence on later science fiction.
A. , B. ; C. : D. no punctuation
D. No punctuation. Do not split the subject from the verb.
The scientists rejected the first explanation, the second explanation accounted for every observation.
Give the strongest SAT-style repair without changing meaning.
The scientists rejected the first explanation because the second explanation accounted for every observation
The report seemed complete ___ however, several data tables were missing.
A. , B. ; C. : D. no punctuation
B. Semicolon before “however” because complete clauses appear on both sides.
Select the best punctuation:
The researchers reached one conclusion ___ the original theory could not explain the new evidence.
A. , B. ; C. : D. —
C. Colon. The second clause explains the “one conclusion.”
Despite containing several major errors ___ early maps shaped later exploration.
A. ; B. , C. : D. —
B. “Despite…” creates an introductory phrase, so use a comma.