Adjective Agreement: Matching Gender
Grammar Rule in 30 Seconds
In Portuguese, adjectives must match the gender (masculine/feminine) and number (singular/plural) of the noun they describe.
- Masculine nouns usually end in -o: 'O carro bonito' (The beautiful car).
- Feminine nouns usually end in -a: 'A casa bonita' (The beautiful house).
- Adjectives must change their ending to match the noun's gender.
Overview
In Portuguese, describing the world accurately requires adherence to adjective agreement. Unlike English, where adjectives remain constant regardless of the noun they modify (e.g., "a fast car" and "a fast internet"), Portuguese adjectives are dynamic. They undergo morphological changes, primarily in their endings, to agree in gender with the noun they describe.
This foundational grammatical principle ensures clarity, grammatical cohesion, and a natural rhythm in speech and writing. Failing to implement adjective agreement results in grammatically incorrect and unnatural-sounding Portuguese, hindering comprehension.
Grammatical gender, while often arbitrary from a logical standpoint (e.g., a mesa – the table, is feminine; o livro – the book, is masculine), is an intrinsic property of all nouns in Portuguese. The adjective's role is to reflect this inherent gender, acting as a linguistic echo. This system helps differentiate between similar-sounding words and reinforces the connection between a noun and its descriptor.
For learners, mastering this agreement is not merely a formality; it is essential for constructing intelligible and idiomatic sentences in Portuguese.
How This Grammar Works
masculino) or feminine (feminino). This assignment impacts every word that modifies the noun, including articles, demonstratives, and, crucially, adjectives. The grammatical gender of a noun dictates the form an adjective must take when describing it.o carro (the car), which is masculine, you would say o carro é rápido (the car is fast). If you refer to a internet (the internet), which is feminine, you must say a internet é rápida (the internet is fast). The adjective rápido changes to rápida to match the noun's gender.o/os for masculine, a/as for feminine; um/uns for masculine, uma/umas for feminine).um amigo (a friend, masculine) versus uma amiga (a friend, feminine).Formation Pattern
-o/-a Pattern (Most Common)
-o in their masculine singular form. To form the feminine singular, you simply change the -o to -a.
bonito | bonita | pretty |
cansado | cansada | tired |
novo | nova | new |
alto | alta | tall, high |
O dia está lindo. (The day is beautiful.) A noite está linda. (The night is beautiful.)
-e (Invariant)
-e in the singular form do not change for gender. They remain the same for both masculine and feminine nouns.
inteligente | intelligent |
grande | big, large |
alegre | happy |
Ele é um homem inteligente. (He is an intelligent man.) Ela é uma mulher inteligente. (She is an intelligent woman.)
-l or -z (Generally Invariant)
-l or -z in the singular form also remain invariant for gender.
fácil | easy |
azul | blue |
feliz | happy |
É um trabalho difícil. (It's a difficult job.) É uma tarefa difícil. (It's a difficult task.)
-ês to -esa: For nationalities ending in -ês.
português | portuguesa | Portuguese |
francês | francesa | French |
Ele é português. (He is Portuguese.) Ela é portuguesa. (She is Portuguese.)
-or to -ora: Adjectives often derived from verbs or describing characteristics.
trabalhador | trabalhadora| hard-working |
falador | faladora | talkative |
Ele é um professor trabalhador. (He is a hard-working professor.) Ela é uma professora trabalhadora. (She is a hard-working professor.)
-ão to -ã or -oa: A less common but important pattern.
alemão | alemã | German |
cristão | cristã | Christian |
são | sã | healthy, saintly |
patrão (boss, noun) | patroa (boss, noun) | boss |
Ele é alemão. (He is German.) Ela é alemã. (She is German.)
-a: These are often derived from nouns and do not change for gender, acting as invariant adjectives. Common examples are colors like rosa (pink) and laranja (orange). This is because the word itself is a noun being used adjectivally, and as such, it retains its original form.
Comprei um carro rosa. (I bought a pink car.) Comprei uma bicicleta rosa. (I bought a pink bicycle.)
Gender & Agreement
o/a, um/uma) is your primary indicator of a noun's gender.- Masculine Nouns: Often end in
-o(o livro),-or(o professor),-u(o tabu), or certain Greek-derived endings like-emaor-ma(o problema,o poema). However, some feminine nouns also end in-o(e.g.,a mão– the hand,a rádio– the radio). Articles are crucial here:o carro,um dia. - Feminine Nouns: Often end in
-a(a casa),-agem(a viagem),-ção/-são(a canção,a visão),-dade(a cidade). However, some masculine nouns end in-a(e.g.,o planeta– the planet,o sofá– the sofa). Rely on the article:a mesa,uma foto.
O meu amigo é muito simpático.(My friend is very friendly – masculine singular nounamigorequires masculine singular adjectivesimpático.)A minha vizinha é muito simpática.(My neighbor is very friendly – feminine singular nounvizinharequires feminine singular adjectivesimpática.)
- 1Multiple Nouns of the Same Gender: If all nouns are masculine, the adjective will be masculine plural. If all nouns are feminine, the adjective will be feminine plural.
Os livros e os cadernos são novos.(The books and notebooks are new – bothlivrosandcadernosare masculine plural, sonovosis masculine plural.)As mesas e as cadeiras são novas.(The tables and chairs are new – bothmesasandcadeirasare feminine plural, sonovasis feminine plural.)
- 1Multiple Nouns of Mixed Gender: This is a critical rule: If an adjective modifies two or more nouns of different genders, the adjective takes the masculine plural form. In Portuguese grammar, the masculine plural is considered the default or
Adjective Gender and Number Table
| Gender | Singular | Plural |
|---|---|---|
|
Masculine
|
-o
|
-os
|
|
Feminine
|
-a
|
-as
|
|
Neutral (Consonant)
|
None
|
-es
|
Meanings
Adjective agreement is the grammatical process where adjectives change their form to reflect the gender and number of the noun they modify.
Gender Agreement
Matching the masculine/feminine ending of the adjective to the noun.
“O livro novo.”
“A mesa nova.”
Number Agreement
Matching the singular/plural status of the noun.
“Os livros novos.”
“As mesas novas.”
Reference Table
| Form | Structure | Example |
|---|---|---|
|
Affirmative
|
Noun + Adjective
|
O gato preto
|
|
Negative
|
Noun + não + ser + Adjective
|
O gato não é preto
|
|
Question
|
Noun + ser + Adjective?
|
O gato é preto?
|
|
Plural Affirmative
|
Plural Noun + Plural Adjective
|
Os gatos pretos
|
|
Plural Negative
|
Plural Noun + não + ser + Plural Adjective
|
Os gatos não são pretos
|
|
Plural Question
|
Plural Noun + ser + Plural Adjective?
|
Os gatos são pretos?
|
Formality Spectrum
A residência é muito bela. (Describing a home)
A casa é muito bonita. (Describing a home)
A casa é linda. (Describing a home)
A casa é show. (Describing a home)
Gender Agreement Map
Masculine
- O carro The car
- O menino The boy
Feminine
- A casa The house
- A menina The girl
Adjective Ending Patterns
Agreement Decision Tree
Is the noun masculine?
Common Adjective Endings
Standard
- • -o/-a
- • -os/-as
Neutral
- • -e
- • -l
- • -z
Examples by Level
O menino é alto.
The boy is tall.
A menina é alta.
The girl is tall.
O livro é novo.
The book is new.
A mesa é nova.
The table is new.
Os meninos são altos.
The boys are tall.
As meninas são altas.
The girls are tall.
O aluno inteligente.
The intelligent student.
A aluna inteligente.
The intelligent student.
Eles são muito simpáticos.
They are very nice.
Elas são muito simpáticas.
They are very nice.
O problema é difícil.
The problem is difficult.
A tarefa é difícil.
The task is difficult.
O carro e a moto estão quebrados.
The car and the motorcycle are broken.
As casas são muito antigas.
The houses are very old.
Ele é um homem muito corajoso.
He is a very brave man.
Ela é uma mulher muito corajosa.
She is a very brave woman.
Os resultados foram surpreendentes.
The results were surprising.
A decisão foi tomada rapidamente.
The decision was taken quickly.
Eram pessoas extremamente dedicadas.
They were extremely dedicated people.
O projeto parece bastante viável.
The project seems quite feasible.
Tais medidas são consideradas necessárias.
Such measures are considered necessary.
Aquelas montanhas são imensas.
Those mountains are immense.
Os fatos são claros e precisos.
The facts are clear and precise.
A situação tornou-se complexa.
The situation became complex.
Easily Confused
Learners confuse 'bom' (adjective) with 'bem' (adverb).
Learners assume all nouns ending in -a are feminine.
Learners try to change adjectives like 'inteligente' to 'inteligento'.
Common Mistakes
A casa bonito
A casa bonita
O menino alta
O menino alto
A mesa novo
A mesa nova
O carro bonita
O carro bonito
Os carros bonito
Os carros bonitos
As mesas nova
As mesas novas
Os meninos alta
Os meninos altos
O problema difícil
O problema difícil
A mulher alto
A mulher alta
Os problemas difíceis
Os problemas difíceis
Aquelas coisas são muito bom
Aquelas coisas são muito boas
As decisões foi tomada
As decisões foram tomadas
O projeto é viáveis
O projeto é viável
Eles são muito dedicada
Eles são muito dedicados
Sentence Patterns
O/A ___ é ___.
Os/As ___ são ___.
Ele é um ___ muito ___.
Aquelas ___ são ___.
Real World Usage
Foto linda! 😍
Tudo bem? O dia foi longo.
Sou uma pessoa muito dedicada.
Um café bem quente, por favor.
O hotel é muito caro.
Pizza deliciosa!
Check the Article
Don't Guess
Listen to Natives
Regional Differences
Smart Tips
Always learn the noun with its article (e.g., 'o carro', not just 'carro').
Check both the noun and the adjective for the -s.
Remember that -e adjectives don't change for gender, only number.
If the group is mixed, always use the masculine plural.
Pronunciation
Final -o
In many dialects, final -o sounds like 'u'.
Final -a
Final -a is pronounced clearly as 'ah'.
Statement
O carro é bonito. ↘
Falling intonation for declarative sentences.
Question
O carro é bonito? ↗
Rising intonation for yes/no questions.
Memorize It
Mnemonic
O for the Boy, A for the Lady; match the ending, don't be lazy!
Visual Association
Imagine a blue 'O' shaped balloon for masculine nouns and a pink 'A' shaped apple for feminine nouns. Every time you see a noun, imagine sticking the corresponding balloon or apple onto the adjective.
Rhyme
If the noun ends in O, make the adjective go with O. If the noun ends in A, the adjective must end in A.
Story
Pedro (masculine) wears a blue shirt (bonito). Maria (feminine) wears a red dress (bonita). They walk together to the park. Pedro is tall (alto), Maria is tall (alta). They are both happy (felizes).
Word Web
Challenge
Look around your room. Pick 5 objects, identify their gender, and write down an adjective that matches each one.
Cultural Notes
In informal Brazilian Portuguese, plural 's' is sometimes dropped in speech, though it is incorrect in writing.
European Portuguese speakers are very strict about plural agreement in all contexts.
Adjective agreement follows standard Portuguese rules, similar to European norms.
Portuguese adjective agreement stems directly from Latin, where adjectives had to agree in gender, number, and case.
Conversation Starters
Como é o seu carro?
Você acha a cidade bonita?
Como são os seus amigos?
Qual é a sua opinião sobre este projeto?
Journal Prompts
Common Mistakes
Test Yourself
A casa é ___.
Which is correct?
Find and fix the mistake:
Os meninos são alta.
O livro é novo.
Match each item on the left with its pair on the right:
A: Como é o seu trabalho? B: Meu trabalho é ___.
Rearrange: As meninas são inteligente.
Adjectives ending in -e change for gender.
Score: /8
Practice Exercises
8 exercisesA casa é ___.
Which is correct?
Find and fix the mistake:
Os meninos são alta.
O livro é novo.
Match: A mesa / O gato
A: Como é o seu trabalho? B: Meu trabalho é ___.
Rearrange: As meninas são inteligente.
Adjectives ending in -e change for gender.
Score: /8
Practice Bank
12 exercisesO menino é alto, mas a menina é ___.
Essa bolsa é muito ___ (caro).
A comida japonês é deliciosa.
Select the adjective that works for BOTH genders:
Match the pairs.
Lisboa é uma cidade ___ (lindo).
Which one describes a 'cold beer' correctly?
camisa / uma / nova / comprei / eu
O problema é complicada.
A minha tia é muito ___ (falador).
Ele é ___.
Eu tenho uma bicicleta ___ (amarelo).
Score: /12
FAQ (8)
No, many end in -e, -l, or -z and are gender-neutral.
Use the masculine plural form.
Only in very informal speech; avoid it in writing.
Look at the ending (-o/-a) or the article (o/a).
Yes, some nouns have irregular genders.
Yes, most colors agree with the noun.
It is an irregular noun; it is masculine.
No, you must add -s for plural.
Scaffolded Practice
1
2
3
4
Mastery Progress
Needs Practice
Improving
Strong
Mastered
In Other Languages
Concordancia de género y número
The pronunciation of the endings is the main difference.
Accord de l'adjectif
French agreement is often orthographic rather than phonetic.
Adjektivdeklination
German agreement depends on the role of the noun in the sentence, not just gender.
None
Japanese is completely invariant regarding noun agreement.
Tabaqiyya
Arabic has a dual number category that Portuguese lacks.
None
Chinese lacks any inflectional morphology for agreement.
Learning Path
Prerequisites
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