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Applying Capitalization and Punctuation Rules

This lesson shows you how to capitalize words correctly and choose the right punctuation mark for statements, questions, exclamations, and commands. You will also learn how to punctuate dialogue between characters, including where to place commas, capital letters, and quotation marks in a conversation.

Introduction

You already know that a sentence starts with a capital letter and ends with a punctuation mark. Now you will use these rules in longer sentences, in sentences that ask or show feeling, and in stories where characters talk to each other.

Capital Letters in Longer Sentences

A long sentence still gets only one capital letter at the very start, no matter how many words it has. Look at this sentence: "My best friend, Marcus, and I rode our bikes to the park on Saturday." The word "Marcus" is capitalized because it is a proper noun, a naming word for a specific person. "Saturday" is capitalized because it names a day. Every other word stays lowercase unless it is a name.

When a sentence has two parts joined by a small word like "and" or "but," you only capitalize the first word of the whole sentence. You do not capitalize the word right after "and" or "but."

Matching Punctuation to Sentence Type

Every sentence you write is one of four types, and each type ends with its own punctuation mark.

A statement tells something and ends with a period. Example: "The library closes at five o'clock."
A question asks something and ends with a question mark. Example: "What time does the library close?"
An exclamation shows strong feeling and ends with an exclamation point. Example: "The library is closing right now!"
A command tells someone to do something. It usually ends with a period, but it can end with an exclamation point when it shows urgency, like "Stop right there!"

The table below compares all four sentence types side by side.

Each sentence type ends with its own punctuation mark.

Punctuating Dialogue

When two or more characters talk in a story, each speaker's exact words go inside quotation marks. You capitalize the first word inside the quotation marks, even if it comes in the middle of the whole sentence.

Look at this example: Maria said, "The bus is late again." Then Sam asked, "Did you call the driver?"

Notice the comma right before the opening quotation marks. It separates the "said" or "asked" part from the spoken words. The punctuation mark that ends the spoken words, like a period or a question mark, goes inside the closing quotation marks.

Worked Example

Fix this sentence: my aunt asked can we visit the museum on friday

Corrected: My aunt asked, "Can we visit the museum on Friday?"

Here are the steps. Capitalize "My" because it starts the sentence. Add a comma before the quoted question begins. Capitalize "Can" because it is the first word inside the quotation marks. Capitalize "Friday" because it names a day. Place the question mark inside the closing quotation marks, since the quoted words ask a question.

Try It Yourself

Write three sentences about your day: one statement, one question, and one exclamation. Then write a short conversation between two characters, using quotation marks, commas, and capital letters correctly. For more practice spotting tricky spots in longer sentences, try Mastering Punctuation and Capitalization.

Related lessons

Using Punctuation Marks and Capitals