Attach grammatical gender to the noun
Portuguese nouns have grammatical gender, including names of objects. A book is masculine, um livro, and a table is feminine, uma mesa. The owner’s gender does not change the object’s noun class. Record a new noun with an article and a short phrase rather than as a bare translation. Nouns for people may have changing forms or one shared form whose article varies. These vocabulary patterns should be learned specifically; they are not a reason to infer how a person identifies from an object’s grammatical behavior.
Tenho um livro.
I have a book.
The noun is masculine singular, so the indefinite article agrees with that class and number. The person possessing the book does not determine the article. The phrase introduces one item rather than an established set.
Tenho uma mesa.
I have a table.
The noun is feminine singular and takes its matching indefinite article. Learning the two words together preserves gender as part of vocabulary. The verb describes possession but does not change the noun’s class.
References for this explanation
Use definite and indefinite articles for different references
An indefinite article commonly introduces a member of a category. A definite article can identify an item through prior mention or shared context. Compare Tenho um livro. O livro é novo. The object has not changed; the listener now knows which object is being described. Portuguese definite articles also occur in broader general and conventional uses, so identifiable is a starting explanation rather than a universal test for every phrase. Check the conversation as well as the noun’s gender and number. A picture alone may not reveal which reference the speaker intends.
Tenho um livro. O livro é novo.
I have a book. The book is new.
The second sentence refers back to the same book introduced in the first. The masculine singular definite article marks that established reference. The adjective separately agrees with the noun it describes.
Tenho uma mesa. A mesa é pequena.
I have a table. The table is small.
The earlier mention makes the table identifiable. The definite article remains feminine because the noun is feminine, and the describing adjective follows that same class. Reference and gender are separate decisions.
Follow a complete example
Build a sentence with this meaning: I have a book. The book is new. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: I have a book. The book is new. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- The second sentence refers back to the same book introduced in the first. The masculine singular definite article marks that established reference. The adjective separately agrees with the noun it describes.
- Now read the complete sentence, Tenho um livro. O livro é novo.. Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
Tenho um livro. O livro é novo. I have a book. The book is new.
References for this explanation
Make regular plurals agree throughout the phrase
Many ordinary nouns and adjectives add s in the plural, and the articles change too: o livro novo becomes os livros novos. The feminine pattern works similarly: a mesa pequena becomes as mesas pequenas. Other plural patterns exist, so this is a regular starting model rather than a universal spelling algorithm. A number makes the intended quantity clear but does not remove the written plural endings. In deliberate writing, inspect the entire phrase. Leaving only the article plural while keeping the noun and adjective singular does not follow the standard model practiced here.
Os livros são novos.
The books are new.
The masculine plural noun requires its plural definite article. The verb and adjective also reflect the plural subject. Several coordinated grammatical choices express the same number across the sentence.
As mesas são pequenas.
The tables are small.
The adjective describes a feminine plural noun and takes the matching ending. The article and noun already show plurality, but that does not make adjective agreement optional in the standard written model.
References for this explanation
Treat final vowels as tendencies with exceptions
Many nouns ending in o are masculine, and many ending in a are feminine. Exceptions are common enough that the article must remain part of vocabulary learning. O dia and o problema are masculine despite the final vowel, while a mão is feminine. Nouns with other endings require their own checks. A useful study habit is to group an exception with a complete adjective phrase, making gender visible twice. This is more reliable than guessing from spelling and then repeating the guess until it feels familiar.
O dia está bonito.
The day is beautiful.
This noun is masculine despite ending in a vowel often associated with feminine nouns. The article and adjective follow the established noun class. The state description does not change the noun’s gender.
A mão está fria.
The hand is cold.
The noun is feminine despite its ending. The article and adjective both agree with its actual grammatical class. Recording a full phrase helps preserve this exception beyond a single isolated article choice.
References for this explanation
Use indefinite plurals and exact numbers carefully
The indefinite plural articles uns and umas introduce an unspecified set or an approximate quantity in some contexts. For a basic exact count, a number can determine the noun directly: dois livros, duas mesas. The word for two itself changes for gender. Do not place a singular indefinite article before a plural count. Countable units also help describe substances when a specific quantity matters, such as a glass of water. This lesson focuses on ordinary separate items; countability and quantity expressions deserve their own attention when vocabulary shifts to materials or abstract ideas.
Tenho uns livros.
I have some books.
The masculine plural indefinite article introduces an unspecified set. Both gender and number match the noun. This differs from an exact numerical statement, which would specify how many books there are.
Tenho duas mesas.
I have two tables.
The exact number determines the noun directly and takes the feminine form required by the noun. The plural noun ending remains necessary. Number words can therefore participate in gender agreement as well as quantity.
References for this explanation
Check adjective patterns and nouns for people
Many adjectives alternate final o and a, then add plural s, but others use one singular form for both genders. Feliz can describe a man or a woman; its plural is felizes. Some nouns for people also share a form, such as estudante, with an article helping identify the intended grammatical gender. Professions can follow ser without an indefinite article in a basic classification: Ela é médica. Do not copy the English article mechanically or assume that every describing word must end in the same vowel as the noun.
Ela é estudante.
She is a student.
This noun has a shared form for masculine and feminine reference in the basic construction. The personal subject supplies the intended referent. A bare classification after the verb does not automatically require the English indefinite article.
As estudantes estão felizes.
The female students are happy.
The adjective has one singular form for both genders, but it still changes for plural number. The feminine plural article identifies the noun phrase, while the adjective follows its own plural spelling pattern.
Try the reasoning with less help
Build a sentence with this meaning: She is a student. Before looking at the answer, identify which information controls the grammatical choice.
- First, identify the message: She is a student. Keep that message fixed while comparing forms. A sentence can be grammatical yet communicate something different, so meaning is part of the decision.
- This noun has a shared form for masculine and feminine reference in the basic construction. The personal subject supplies the intended referent. A bare classification after the verb does not automatically require the English indefinite article.
- Now read the complete sentence, Ela é estudante.. Check the words surrounding your choice as well as the choice itself. Explain what would change if the speaker, number, or intended message changed. Then cover this example and reconstruct the sentence from the English cue.
Compare your reasoning
Ela é estudante. She is a student.
Recognize variation without losing a useful writing model
Articles before personal names and possessives vary across Brazilian regions and styles. You may hear a name with or without an article, so avoid declaring one familiar regional pattern universal. This lesson’s object noun phrases provide a stable foundation for standard agreement. Irregular plurals also need individual attention: a mão becomes as mãos. As you expand vocabulary, check the dictionary’s gender and plural information, then write one useful sentence. Review by changing a singular phrase to plural and explaining each change, rather than treating agreement as a list of disconnected endings.
As mãos estão frias.
The hands are cold.
This feminine noun has a plural that keeps its nasal vowel and adds the appropriate ending. The article and adjective also become plural. A dictionary check prevents applying an unrelated plural pattern to a familiar singular word.
O problema é pequeno.
The problem is small.
The noun is masculine despite its final vowel. Both the article and adjective follow that class. The sentence describes the size or seriousness of an identified problem, so the definite phrase fits the intended reference.
References for this explanation
Notice the difference
Common mistakes
Do not guess gender from one vowel
Instead ofa problema
For this meaningo problema
The noun is masculine despite its final vowel. Gender belongs to the vocabulary item and controls the article. Record the exception with a complete phrase so that later adjective choices follow the same correct class. A frequent ending tendency is useful as a clue, but it does not replace a dictionary check.
Plural agreement spans the phrase
Instead ofas mesa pequena
For this meaningas mesas pequenas
The standard written noun phrase needs plural marking on the article, noun, and adjective. A plural article does not make the other endings unnecessary in this model. Say the singular phrase first, then change each relevant element while preserving the same gender and descriptive meaning.
Not every person noun changes its ending
Instead ofuma estudanta
For this meaninguma estudante
This noun uses a shared form rather than an invented feminine ending. The feminine article can mark the intended reference. Learn the actual lexical pattern instead of applying a final vowel change to every word for a person. The same caution applies to adjectives whose gender forms are identical.
From understanding to using
Make your own example.
Try these without answer choices. Say your answer aloud or write it below, then compare your reasoning with the model.
Your turn 1
Introduce a book and a table, then describe the table as small.
Compare with a model
Tenho um livro e uma mesa. A mesa é pequena.
I have a book and a table. The table is small.
The first sentence uses a different indefinite article for each noun’s gender. The second refers back to the table with its definite article and adds a feminine singular adjective. The change from indefinite to definite concerns the listener’s ability to identify the referent. It does not change the object’s gender or imply that a second table has appeared.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Your turn 2
Change the new book and the small table into plural phrases.
Compare with a model
Os livros novos. As mesas pequenas.
The new books. The small tables.
Each phrase changes the article, noun, and adjective to plural. The masculine and feminine classes remain the same as in the singular vocabulary items. Read the whole phrase as one agreement unit, then cover the model and reconstruct it. For a new noun, check whether its plural is regular before extending the same spelling procedure.
- Did you preserve the requested meaning?
- Does the form match the person or noun in your message?
- Can you explain your choice before looking at the model?
Put it into practice
Make the next choice.
Choose a response and learn why it works. Your score reflects your first answer to each question. You can revisit anything you miss.
Choose an answer, then open the explanation to check your reasoning.
Question 1
Complete the sentence for this meaning: I have a book.
Tenho ___ livro.
- um
- uma
Check the answer
Answer: um
um: The noun is masculine singular, so the indefinite article agrees with that class and number. The person possessing the book does not determine the article. The phrase introduces one item rather than an established set.
uma: This is feminine singular. It does not agree with the masculine noun in the phrase.
Question 2
Complete the sentence for this meaning: I have a table.
Tenho ___ mesa.
- um
- uma
Check the answer
Answer: uma
um: This masculine form does not match the feminine noun. The object’s owner has no effect on that agreement.
uma: The noun is feminine singular and takes its matching indefinite article. Learning the two words together preserves gender as part of vocabulary. The verb describes possession but does not change the noun’s class.
Question 3
Complete the sentence for this meaning: I have a book. The book is new.
Tenho um livro. ___ livro é novo.
- O
- A
Check the answer
Answer: O
O: The second sentence refers back to the same book introduced in the first. The masculine singular definite article marks that established reference. The adjective separately agrees with the noun it describes.
A: This is feminine singular. The definite meaning fits, but the article’s gender does not match the noun.
Question 4
Complete the sentence for this meaning: I have a table. The table is small.
Tenho uma mesa. ___ mesa é pequena.
- O
- A
Check the answer
Answer: A
O: This masculine article does not agree with the feminine noun, even though a definite article is appropriate for the reference.
A: The earlier mention makes the table identifiable. The definite article remains feminine because the noun is feminine, and the describing adjective follows that same class. Reference and gender are separate decisions.
Question 5
Complete the sentence for this meaning: The books are new.
___ livros são novos.
- Os
- O
Check the answer
Answer: Os
Os: The masculine plural noun requires its plural definite article. The verb and adjective also reflect the plural subject. Several coordinated grammatical choices express the same number across the sentence.
O: This is singular. It cannot determine the plural noun in the standard phrase shown.
Question 6
Complete the sentence for this meaning: The tables are small.
As mesas são ___.
- pequena
- pequenas
Check the answer
Answer: pequenas
pequena: This is feminine singular. The description must agree with the several tables named by the subject.
pequenas: The adjective describes a feminine plural noun and takes the matching ending. The article and noun already show plurality, but that does not make adjective agreement optional in the standard written model.
Question 7
Complete the sentence for this meaning: The day is beautiful.
___ dia está bonito.
- O
- A
Check the answer
Answer: O
O: This noun is masculine despite ending in a vowel often associated with feminine nouns. The article and adjective follow the established noun class. The state description does not change the noun’s gender.
A: This guesses gender from the final vowel. The noun is masculine and requires its matching article.
Question 8
Complete the sentence for this meaning: The hand is cold.
___ mão está fria.
- O
- A
Check the answer
Answer: A
O: This masculine article does not agree with the noun. A common ending tendency cannot override the vocabulary item’s established gender.
A: The noun is feminine despite its ending. The article and adjective both agree with its actual grammatical class. Recording a full phrase helps preserve this exception beyond a single isolated article choice.
Question 9
Complete the sentence for this meaning: I have some books.
Tenho ___ livros.
- uns
- um
Check the answer
Answer: uns
uns: The masculine plural indefinite article introduces an unspecified set. Both gender and number match the noun. This differs from an exact numerical statement, which would specify how many books there are.
um: The singular article cannot determine this plural noun in the standard phrase. The intended set requires plural grammar.
Question 10
Complete the sentence for this meaning: I have two tables.
Tenho ___ mesas.
- dois
- duas
Check the answer
Answer: duas
dois: This is the masculine form of two. It does not agree with the feminine noun being counted.
duas: The exact number determines the noun directly and takes the feminine form required by the noun. The plural noun ending remains necessary. Number words can therefore participate in gender agreement as well as quantity.
Question 11
Complete the sentence for this meaning: She is a student.
Ela é ___.
- estudante
- estudanta
Check the answer
Answer: estudante
estudante: This noun has a shared form for masculine and feminine reference in the basic construction. The personal subject supplies the intended referent. A bare classification after the verb does not automatically require the English indefinite article.
estudanta: This invents a feminine ending for a noun that uses a shared form. Learn the vocabulary pattern rather than changing every final vowel.
Question 12
Complete the sentence for this meaning: The female students are happy.
As estudantes estão ___.
- felizas
- felizes
Check the answer
Answer: felizes
felizas: This invents a feminine adjective form. The adjective’s gender pattern does not alternate its ending in that way.
felizes: The adjective has one singular form for both genders, but it still changes for plural number. The feminine plural article identifies the noun phrase, while the adjective follows its own plural spelling pattern.
Question 13
Complete the sentence for this meaning: The hands are cold.
As ___ estão frias.
- mãos
- mães
Check the answer
Answer: mãos
mãos: This feminine noun has a plural that keeps its nasal vowel and adds the appropriate ending. The article and adjective also become plural. A dictionary check prevents applying an unrelated plural pattern to a familiar singular word.
mães: This is a different word, meaning mothers. Similar nasal spellings do not make the words interchangeable.
Question 14
Complete the sentence for this meaning: The problem is small.
___ problema é pequeno.
- A
- O
Check the answer
Answer: O
A: The feminine article does not agree with this noun. Ending based guesses must yield to the established vocabulary form.
O: The noun is masculine despite its final vowel. Both the article and adjective follow that class. The sentence describes the size or seriousness of an identified problem, so the definite phrase fits the intended reference.
Keep the conversation going
What to practice next
Return to the production tasks after a break. Reconstruct your sentences without the models, compare the meaning and form, and repair any error by explaining its cause. Then use one sentence in a short exchange of your own.
Sources and editorial notes
By Loquus ·
Source checked with AI assistance
These original explanations synthesize the cited sources. They have not been certified by an independent human language specialist. Regional usage and context are described where they affect the answer. Report a correction in the discussion below.
- Ricardo Aragón and Steel Wagstaff: Lição 1
- Dicionário Priberam: artigo
- Dicionário Priberam: livro
- Dicionário Priberam: mesa
- Dicionário Priberam: dia
- Dicionário Priberam: mão
- Dicionário Priberam: problema
- University of Washington, Bate Papo: Description and appearance
- University of Washington, Bate Papo: Professions and daily activities
- University of Washington, Bate Papo: Family
- Dicionário Priberam: ser
- Dicionário Priberam: ter
Learning research behind the practice
Worked examples, retrieval practice, and later review inform the activities. These studies do not establish the effectiveness of this specific lesson.
- Karpicke and Roediger: The critical importance of retrieval for learning
- Butler and Roediger: Feedback enhances the positive effects and reduces the negative effects of multiple choice testing
- Institute of Education Sciences: Organizing Instruction and Study to Improve Student Learning
- Rittle Johnson and Star: Compared to what?