Portuguese Phrase
Quais plataformas online são melhores?
Meaning
The sentence asks the listener to identify which online platforms are considered superior. It is a neutral‑tone question used when comparing services, apps, or websites.
When to use
Use this question in conversations about technology, e‑learning, streaming, or any context where you need to compare several internet‑based tools. It works both in formal meetings and casual chats.
✦Grammar Breakdown
Quaisplataformasonlinesãomelhores?
Quais (interrogative adjective)
Used to ask about a plural set; matches the gender and number of the noun it modifies.
plataformas (feminine plural noun)
The subject of the sentence; plural agreement required with the verb and adjective.
online (borrowed adjective/adverb)
Adopted from English, it works as an adjective placed before the noun, without gender/number change.
são (verb ser, 3rd person plural)
Links the subject to the predicate adjective; must agree with the plural subject.
melhores (comparative adjective)
Irregular comparative of "bom"; it already expresses the idea of "better" and does not need "mais".
🗨In Conversation
Quais plataformas online são melhores?
Which online platforms are better?
Depende do que você precisa; para cursos eu recomendo Coursera ou Udemy, e para streaming, Netflix ou Disney+.
It depends on what you need; for courses I recommend Coursera or Udemy, and for streaming, Netflix or Disney+.
✕Common Mistakes
Quais plataformas online são mais melhores?
"Melhor" is already a comparative; adding "mais" creates a redundancy.
Qual plataformas online são melhores?
"Qual" is singular; the subject is plural, so use "quais".
Quais plataformas online são melhor?
The adjective must agree in number with the plural subject: "melhores".
↔Alternatives
Quais são as melhores plataformas online?
Which are the best online platforms?
Qual plataforma online é a melhor?
Which online platform is the best?
Qual das plataformas online é a melhor?
Which of the online platforms is the best?
Cultural Tip
In Portuguese the comparative of "bom" is "melhor" (not "mais bom"). When you need a superlative, use "o melhor" or "a melhor". Also, the word "online" is widely accepted as an adjective, so you can place it before or after the noun without changing its form.