O profissional chegou cedo.

O is the masculine singular definite article, meaning the.

So o profissional = the professional.

In Portuguese, articles are used more often than in English, so it is very normal to say o profissional where English might sometimes just say the professional or even leave the article out in other contexts.

Here, profissional is a noun: the professional.

But profissional can also be an adjective, meaning professional.

Compare:

• O profissional chegou cedo. = The professional arrived early.
• Ela teve uma atitude profissional. = She had a professional attitude.

So the same word can work in both ways, depending on the sentence.

In this sentence, o profissional is masculine singular.

For a woman, you would usually say:

• A profissional chegou cedo.

The word profissional itself does not change form here; only the article changes:

• o profissional = the male professional
• a profissional = the female professional

This is common with some Portuguese nouns referring to people.

Chegou comes from the verb chegar, meaning to arrive.

It is in the pretérito perfeito in European Portuguese, which usually corresponds to the simple past in English:

• chegar = to arrive
• chegou = arrived

So O profissional chegou cedo means that the action is completed: the professional arrived early.

Chegou is the completed past: it tells us the arrival happened as a finished event.

• chegou cedo = arrived early

Chegava is the imperfect, which gives a different feel, often more habitual, ongoing, or descriptive:

• chegava cedo = used to arrive early / was arriving early

So in your sentence, chegou is used because it refers to one completed arrival.

Here, cedo is an adverb, and it means early.

It modifies the verb chegou:

• chegou cedo = arrived early

So it tells us when or how early the arrival happened.

Yes. Cedo is commonly used as an adverb meaning early, but it also appears in expressions like:

• mais cedo = earlier / sooner
• cedo ou tarde = sooner or later
• muito cedo = very early

So the core idea is connected to earliness in time.

Portuguese often leaves out subject pronouns when they are not needed.

In this sentence, the subject is already expressed as o profissional, so adding ele would be unnecessary:

• O profissional chegou cedo. = natural
• Ele chegou cedo. = also possible, but now he replaces the noun

Portuguese is a language where the verb form often helps identify the subject, and if the noun is already there, a pronoun is usually not added.

Yes, but O profissional chegou cedo is the most neutral and natural order.

You may also hear different orders for emphasis, for example:

• O profissional chegou cedo. = neutral
• Cedo, o profissional chegou. = marked/literary, with emphasis on early
• Chegou cedo, o profissional. = possible in some contexts, but less neutral

For learners, the basic pattern subject + verb + adverb is the safest choice.

In European Portuguese, chegou is pronounced roughly like shuh-GOH.

A few useful points:

• ch sounds like sh
• the unstressed e is often reduced
• ou in modern Portuguese usually sounds like ô rather than a strong English ow

So chegou does not sound like English che-goo.

A rough approximation is:

u pruh-fuh-see-oh-NAL shuh-GOH SEH-doo

A few important notes:

• O often sounds more like u in European Portuguese when unstressed.
• profissional has the stress on the last syllable: -nal
• chegou has the stress on the last syllable: -gou
• cedo has the stress on the first syllable: CE-

This is only an approximation, but it can help you get started.

Yes. Profissional is a broad word. It can refer to a professional person in many fields, depending on context:

• a healthcare professional
• a business professional
• a skilled worker
• someone acting in a professional capacity

So by itself, o profissional is somewhat general unless the surrounding context makes it more specific.