Ao pequeno-almoço, eu comi um croissant quente e o Pedro fez uma torrada com manteiga.

Ao is a contraction of a + o.

• a = at / to
• o = the
• ao = at the

So ao pequeno-almoço means literally at breakfast or at the breakfast time.

This is a very common pattern in Portuguese with meals:

• ao pequeno-almoço = at breakfast
• ao almoço = at lunch
• ao jantar = at dinner

In this sentence, ao pequeno-almoço sets the time context for what happened.

Yes. Pequeno-almoço is the normal European Portuguese word for breakfast.

Literally, it is made up of:

• pequeno = small
• almoço = lunch

But you should treat pequeno-almoço as a fixed word meaning breakfast, not as a phrase you build freely.

This is one of the clearest differences between European and Brazilian Portuguese:

• Portugal: pequeno-almoço
• Brazil: café da manhã

Because pequeno-almoço is written as a fixed compound noun in standard Portuguese.

You should learn it as one unit:

• o pequeno-almoço
• tomar o pequeno-almoço
• ao pequeno-almoço

The hyphen is simply part of the correct spelling.

Because Ao pequeno-almoço is an introductory time expression placed at the beginning of the sentence.

The comma helps separate that opening time phrase from the main clause:

• Ao pequeno-almoço, eu comi...

In English, this is similar to writing:

• At breakfast, I ate...

The comma is natural and helpful here, especially in a teaching example.

Portuguese often leaves subject pronouns out because the verb ending already shows the subject.

• comi already tells you the subject is I

So eu is not strictly necessary. You could say:

• Ao pequeno-almoço, comi um croissant quente...

The pronoun eu is included here for one of these common reasons:

• emphasis
• clarity
• contrast with another person

Since the sentence later mentions o Pedro, using eu makes the contrast very clear:

• eu comi...
• o Pedro fez...

Comi is the pretérito perfeito simples, the normal past tense for a completed action.

It comes from the verb comer = to eat.

• eu como = I eat
• eu comi = I ate

Here it describes one completed event in the past: the speaker ate the croissant.

Because comi describes a completed action, while comia usually describes an ongoing, habitual, or background action in the past.

• comi = I ate
• comia = I was eating / I used to eat

In this sentence, the speaker is talking about a specific finished breakfast event, so comi is the natural choice.

Compare:

• Ao pequeno-almoço, comi um croissant. = On that occasion, I ate a croissant.
• Quando era criança, ao pequeno-almoço comia pão com manteiga. = When I was a child, I used to eat bread with butter for breakfast.

Because croissant is treated as a masculine noun in Portuguese:

• um croissant
• o croissant

Many borrowed food words have a fixed grammatical gender in Portuguese, and this one is masculine.

So the adjective must also agree in the masculine singular form:

• um croissant quente

In Portuguese, adjectives often come after the noun.

So:

• um croissant quente = a hot croissant

That is the most neutral and natural word order here.

Portuguese can sometimes place adjectives before the noun, but that often changes the tone, emphasis, or style. With a simple descriptive adjective like quente, the usual position is after the noun.

In European Portuguese, it is very common to use the definite article before a person’s first name:

• o Pedro
• a Maria

This is one of the things that often sounds unusual to English speakers, because English normally does not say the Pedro.

In Portugal, though, this is very natural in everyday speech. It does not sound strange or rude.

You may also hear the name without the article in some contexts, but o Pedro is perfectly normal European Portuguese.

Fez is also pretérito perfeito simples, and it comes from the verb fazer = to do / to make.

• eu faço = I do / I make
• ele faz = he does / he makes
• ele fez = he did / he made

So in the sentence:

• o Pedro fez uma torrada com manteiga

fez means made.

Because fazer uma torrada is a normal way to say make toast in Portuguese.

Here, fazer means to make / prepare food.

This is very common with food and drink:

• fazer café = make coffee
• fazer o jantar = make dinner
• fazer uma sandes = make a sandwich
• fazer uma torrada = make some toast / make a piece of toast

So even though English and Portuguese do not always match word for word, fazer is the natural verb here.

In European Portuguese, torrada usually means toast: bread that has been toasted, often served with butter.

A useful distinction in Portugal is:

• torrada = toast
• tosta = toasted sandwich

So uma torrada com manteiga means toast with butter, not a sandwich.

Depending on the café or the context, uma torrada can sometimes refer to a serving of toast rather than just one tiny slice, so the exact portion may vary.

Because manteiga is being used in a general sense here, as an ingredient.

• com manteiga = with butter

This is very natural when talking about food ingredients in general.

If you said com a manteiga, that would usually refer to a specific butter already identified in the conversation, something like:

• with the butter

So in a simple food description, com manteiga is the normal choice.

Because these are two different grammar situations.

• o Pedro uses the article as part of a common European Portuguese pattern with personal names.
• manteiga has no article because it is being used as an uncountable ingredient in a general way.

So:

• o Pedro = the normal EP way to refer to Pedro
• com manteiga = with butter, generally

Articles in Portuguese are used much more often than in English, but not in exactly the same places every time.

Yes, absolutely.

A very natural version would be:

• Ao pequeno-almoço, comi um croissant quente e o Pedro fez uma torrada com manteiga.

That sounds completely normal in Portuguese.

The version with eu is also correct, but it gives a little more explicit contrast between the two people:

• eu did one thing
• o Pedro did another

So the pronoun is optional here, not required.

Yes, it is very natural.

The structure is:

• time expression first: Ao pequeno-almoço
• subject + verb: eu comi
• object: um croissant quente
• second clause: e o Pedro fez uma torrada com manteiga

This is a clear, standard sentence pattern. It is especially useful for learners because it shows:

• a fronted time phrase
• a simple past tense
• two coordinated clauses with e
• normal noun + adjective order in croissant quente

So overall, the sentence sounds natural and well-formed in European Portuguese.