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Questions & Answers about Estudar é útil.
What is the function of the infinitive estudar in this sentence?
In this sentence, estudar acts as the subject. Although it is an infinitive (the basic, unconjugated form of the verb), it represents the general concept or activity of studying—similar to using a gerund in English (as in Studying is useful).
Why is the verb é conjugated in the singular form even though the subject is an action?
In Portuguese, when an infinitive is used as the subject, it is treated as a singular noun representing a whole idea or activity. Therefore, the verb ser is conjugated in the third-person singular form as é, ensuring proper subject-verb agreement.
What does the adjective útil mean, and does its form change with gender or number?
The adjective útil means useful in English. It is invariant, meaning its form remains the same regardless of the gender or number of the noun it describes. So whether referring to a masculine, feminine, singular, or plural subject, útil stays the same.
Could this sentence be expressed using a noun instead of the infinitive, and what would be the difference?
Yes, you could say O estudo é útil (literally, The study is useful). Using the noun estudo highlights the result or concept of study, whereas the infinitive estudar emphasizes the action or activity itself. Both constructions express the idea that studying is beneficial, but they carry slightly different nuances.
Is Estudar é útil a complete sentence, and what type of sentence is it?
Yes, it is a complete sentence. It is a declarative sentence that states a general truth or observation about the value of studying. Its simple structure—subject (infinitive), verb, and predicate adjective—makes it clear and straightforward.