Adjective Agreement — I can make adjectives agree in gender and number with the nouns they describe in simple sentences.

Historical Context & Motivation

If you've ever wondered why French seems to have so many extra letters tacked onto the ends of words, you're tapping into one of the oldest features of the language. Adjective agreement — the practice of changing an adjective's ending to match the gender and number of the noun it describes — is a system inherited from Latin, the ancestor of French and all the other Romance languages. In Latin, nouns, adjectives, and even articles carried specific endings that signaled their grammatical role in a sentence. As Latin evolved into Old French over many centuries, some of those endings simplified, but the core principle of agreement survived.

Understanding why agreement exists helps you appreciate that it isn't an arbitrary rule invented to confuse learners. It's a communicative tool. In spoken French, where many consonants are silent, agreement sometimes creates audible differences that help listeners distinguish meaning. In written French, the agreement endings act like a tracking system that links adjectives to their nouns even when the words are separated in a sentence. Without agreement, French would lose a layer of clarity that speakers and writers depend on every day.

The central question this lesson addresses is straightforward: How do I change a French adjective so that it correctly matches the noun it describes? Once you learn the patterns, you'll be able to write and say sentences like "la grande maison" (the big house) or "les petits chats" (the small cats) with confidence.

Core Principles of Adjective Agreement

Before you start adding endings, you need to understand the system that drives adjective agreement. French operates on two axes: gender (masculine or feminine) and number (singular or plural). Every noun in French belongs to one gender, and adjectives must reflect that gender as well as whether the noun is singular or plural. The following principles form the foundation of everything you'll practice in this lesson.

Visual Explanation — The Agreement Flowchart

The diagram below shows you exactly how to determine the correct adjective form for any regular adjective. Start at the top with the masculine singular form (the dictionary form), then follow the arrows based on the noun's gender and number.

Notice that the process is always two decisions: first, is the noun masculine or feminine? Second, is it singular or plural? The flowchart above uses petit as an example, but the same pattern applies to hundreds of regular adjectives like grand, intelligent, bleu, vert, français, and many more. Memorize this two-step process and you'll handle most adjectives you encounter in French 1.

How Adjective Agreement Works — The Rules in Detail

Now that you understand the big picture, let's break down the specific rules that govern regular adjective agreement. These rules cover the vast majority of adjectives you'll see in French 1. Later, you'll learn about irregular adjectives, but these regular patterns are your foundation.

Rule 1: Forming the Feminine Singular

Take the masculine singular form and add -e. For example, grand becomes grande. This often makes the final consonant pronounced — grand is pronounced "grahn" (silent d), but grande is "grahnd" (you hear the d). If the masculine already ends in -e (without an accent), nothing changes: rouge stays rouge for both genders.

Rule 2: Forming the Masculine Plural

Take the masculine singular form and add -s. So petit becomes petits. If it already ends in -s or -x, don't add another one: gros stays gros, and heureux stays heureux.

Rule 3: Forming the Feminine Plural

Take the feminine singular form (which already has the -e) and add -s. So petite becomes petites, and grande becomes grandes. This gives you the combined ending -es.

Rule 4: Mixed Groups Default to Masculine

When an adjective describes a group of mixed gender — say, five girls and one boy — the adjective takes the masculine plural form. For example, "Marc et Sophie sont intelligents." This rule is a traditional convention of formal French grammar.

Detailed Patterns & Common Exceptions

While the basic +e / +s / +es pattern covers a large number of adjectives, French has some predictable sub-patterns and common exceptions you should know about early on. The table below groups the most frequent patterns you'll encounter in French 1.

As you study this visual map, focus on recognizing the ending of the masculine form. If it ends in -eux, you know the feminine will end in -euse. If it ends in -if, the feminine will be -ive. Pattern recognition is the fastest way to master agreement endings. Over time, these forms will feel automatic.

Worked Example — Building a Sentence with Correct Agreement

Let's walk through a complete example step by step. We want to say: "The happy girls are active." In French, this becomes "Les filles heureuses sont actives." Here's how we build it.

Common Errors & How to Avoid Them

Even once you know the rules, certain mistakes appear again and again in beginning French. Knowing these pitfalls in advance can help you catch errors before they become habits.

Connection to Advanced French Grammar

The regular adjective agreement patterns you've learned here are the building blocks for more complex structures you'll encounter in French 2 and beyond. The table below previews how these concepts expand as your French skills grow.

The good news is that the fundamental logic never changes. Whether you're dealing with a simple adjective like petit or a complex past participle in a relative clause, the same two questions guide you: What is the gender? What is the number? Master these basics now, and you'll have a reliable framework to handle any agreement challenge that comes your way in future French courses.

Practice Problems

Test your understanding of adjective agreement with these five problems. Each one increases in complexity, so take your time and remember to check both gender and number before selecting your answer.

Lesson Summary — Adjective Agreement