Basic Capitalization — I can capitalize the first word in a sentence and names/places at my level.

Why We Use Capital Letters

Capital letters are used in English writing for a simple reason: they help readers know where a sentence starts and whose name is being used. This lesson focuses on two basic rules that cover most of the capitalization you will use every day.

The two rules are: First, capitalize the first word of every sentence. Second, capitalize names of specific people and places. These two rules will help you write clearly and correctly.

Core Principles & Definitions

Here are the key rules for capitalization. Use these as a guide whenever you are not sure whether a word needs a capital letter.

Visual Explanation — Mapping the Rules

The chart below shows you how to decide whether a word needs a capital letter. For any word you are unsure about, start at the top and follow the arrows based on your yes or no answer.

The chart has three yes-or-no questions. Answer each one in order. Those three questions cover almost every capitalization choice you will need to make in everyday writing.

How the Rules Work in Practice

Let us look at each rule more closely with simple examples. Seeing the rules in action will help you remember them and use them in your own writing.

Rule 1 — Capitalize the First Word of a Sentence

Every sentence in English begins with a capital letter. This rule applies to the first word after a period (.), a question mark (?), or an exclamation mark (!). It also applies at the very start of a piece of writing. Consider this pair of examples: 'The café was crowded. We decided to leave.' Both 'The' and 'We' are capitalized because each begins a new sentence. This rule depends only on position in the sentence, not on the meaning of the word.

Rule 2 — Capitalize Names of People and Places

The name of a specific person or place is always capitalized. 'Maria,' 'Chicago,' 'Amazon River,' and 'Main Street' are all names and are always capitalized. By contrast, their general equivalents—'woman,' 'city,' 'river,' 'street'—are common words and stay lowercase (unless they happen to start a sentence). The key question is: does this word identify one specific person or place? If yes, capitalize it. When a name has more than one word, capitalize each important word: 'Mount Everest,' 'New York City,' 'Golden Gate Bridge.'

Categories of Proper Nouns You Should Know

It helps to know the most common types of names that are always capitalized. The table below shows these groups with examples and the general word they replace.

Worked Example — Correcting a Paragraph

The best way to learn capitalization is to practice fixing real sentences. Below is a short paragraph with capitalization errors. We will go through it one sentence at a time, find each error, name the rule, and write the correct version.

Common Errors & How to Avoid Them

Even after learning the rules, writers often make the same mistakes. The table below shows the most common capitalization errors, why they happen, and the correct form.

Connection to Advanced Capitalization Rules

The two basic rules you have learned—capitalize the first word of a sentence and capitalize names of people and places—are the foundation for all other capitalization rules in English. As your writing grows, you will see these same ideas used in more situations. The table below shows how the basic rules connect to some of those next steps.

Every advanced rule in the right column is really just the same basic idea used in a new situation. When you see a new capitalization question, go back to the main question: Does this word begin a sentence, or is it the name of something specific? That question will guide you correctly in most cases.

Practice Problems

Lesson Summary