The Power of Punctuation

Punctuation marks—like commas, apostrophes, and semicolons—guide readers through your writing and clarify meaning. The ACT English test will ask you to fix or improve sentences by using punctuation correctly.

Common Punctuation Marks

• Commas: Separate ideas or items in a list.
• Apostrophes: Show possession or form contractions.
• Semicolons: Connect closely related independent clauses.
• Colons: Introduce lists or explanations.

When to Use Each Punctuation

• Use a comma before "and" in a list: apples, oranges, and bananas.
• Use apostrophes for singular ('s) and plural (s') possession.
• Connect two sentences: She was late; the bus broke down.

Application in Daily Life

Correct punctuation helps avoid misunderstandings in texts, emails, and essays. It keeps your writing clear and professional.