Question

Which of the following is a good rule to remember about placing a semicolon?

A semicolon can be used where you might use a period.

A semicolon can be used to replace a comma in a complex-compound sentence.

A semicolon can replace a comma before a coordinating conjunction.

A semicolon and colon are interchangeable.

Answer 1

Correct answer: "A semicolon can be used where you might use a period."

Why: a semicolon links two closely related independent clauses that could stand alone as sentences (so it can often replace a period). Example: "She wanted to go; he preferred to stay."

Notes on the others:
- "A semicolon can be used to replace a comma in a complex-compound sentence." — misleading. You might use semicolons to separate independent clauses in compound or compound–complex sentences, or to separate list items that contain commas, but you don't generally "replace a comma" inside clauses.
- "A semicolon can replace a comma before a coordinating conjunction." — no. Use a comma before a coordinating conjunction (for/and/nor/but/or/yet/so) when joining two independent clauses; semicolons are used without a coordinating conjunction.
- "A semicolon and colon are interchangeable." — false. They have different functions (semicolon joins related clauses; colon introduces a list, explanation, or quotation).