CRASE PARA PROVAS (CONCURSOS E VESTIBULARES) TEORIA + RESOLUÇÃO DE EXERCÍCIOS - Profa. Pamba

Summary

This video provides a detailed and practical guide to understanding the use of the crase in Portuguese. It explains the concept as the fusion of two identical vowels, covering essential rules for mandatory, optional, and prohibited cases. Key examples include using crase before feminine articles, expressions of time, and certain names or pronouns, while highlighting exceptions such as verbs, masculine pronouns, and singular-plural mismatches. The instructor offers clear strategies for exams, including a useful substitution trick with 'a este/a esta/a isto' to determine correct usage. The video combines theory, practical examples, and exam tips, making the topic approachable and easier to master.

Takeaways

• 😀 Crase is the fusion of two identical vowels, represented by the grave accent (à).
• 😀 The use of crase requires both a preposition and an article. It cannot exist without both.
• 😀 Crase is mandatory when indicating exact hours, e.g., 'às 19h30'.
• 😀 The grave accent is not used if a preposition like 'entre', 'para', 'de', or 'após' precedes the article, even when referencing time.
• 😀 The use of crase is required in expressions of time or manner with feminine nouns, e.g., 'à tarde', 'à vista'.
• 😀 The grave accent is not used with instruments or tools, e.g., 'à machadadas', 'à facadas'.
• 😀 Crase is facultative (optional) before feminine proper names, as long as prepositions apply.
• 😀 The use of crase is optional before the preposition 'até', e.g., 'iremos até a fazenda'.
• 😀 Crase is never used before verbs or masculine nouns. Example: 'comecei a planejar' (no crase).
• 😀 Plural words cannot be preceded by crase when the preposition and article mismatch in number. 'Às falhas' is correct, but 'à falhas' is wrong.

Q & A

What is the fundamental concept of crase in Portuguese?

Crase is the fusion of two identical vowels, represented graphically by a grave accent (`à`). It occurs when the preposition 'a' meets the feminine singular article 'a' or the demonstrative pronouns 'aquele', 'aquela', or 'aquilo'.

When is the use of crase mandatory?

Crase is mandatory when a preposition 'a' combines with a feminine singular article 'a' before a noun, in expressions of exact time, and in most feminine adverbial expressions (e.g., 'à tarde', 'à vista').

What are the exceptions to using crase before expressions of exact time?

Crase is not used when a preposition precedes the hour, such as 'entre as 13 horas' or 'após as 16 horas', because the preposition is already in place, making the accent unnecessary.

How can you identify whether to use crase with demonstrative pronouns like 'aquela' or 'aquilo'?

You can substitute the demonstrative pronoun with 'a esta', 'a este', or 'a isto'. If the sentence still makes sense, crase is required. For example: 'Nunca compareci àqueles encontros' becomes 'Nunca compareci a estes encontros', confirming the crase.

Is crase used before masculine nouns or pronouns?

No. Crase does not occur before masculine nouns or pronouns. For example, 'os livros foram entregues a ele' does not require an accent.

Can crase be used before pronouns in general?

Crase is generally not used before pronouns, except for some possessive pronouns like 'minha', 'sua', 'nossa' where it is facultative. For example, 'Dirigiu-se à minha mãe' can have crase or not.

Why is crase not used before verbs in the infinitive form?

Crase is not used before infinitive verbs because verbs do not combine with an article. For example, 'comecei a planejar' never takes a crase.

What is the rule for using crase with plural nouns?

Crase occurs only when both the preposition and the article are plural, i.e., plural + plural (e.g., 'refiro-me às falhas'). It does not occur when singular precedes plural.

Which expressions adverbial, prepositional, or conjunctive require crase?

Feminine expressions indicating time, mode, or manner take crase, such as 'à tarde', 'à vontade', 'às cegas', 'à toa'. Exceptions occur when indicating instruments, e.g., 'à facada', where crase is not used.

What practical tip can help quickly identify crase usage in demonstrative pronouns?

Replace the demonstrative pronoun ('aquele', 'aquela', 'aquilo') with 'a este', 'a esta', or 'a isto'. If the sentence remains correct, crase should be applied. This avoids unnecessary complex reasoning.

How can understanding the logic of crase help in exams?

Understanding that crase represents the fusion of preposition + article allows students to analyze sentences independently. By checking for both a preposition and a feminine article, they can determine whether the accent is needed, which improves speed and accuracy in exams.