Hoje não tenho nenhuma dúvida sobre o exame.

Today I have no doubt about the exam.

Breakdown of Hoje não tenho nenhuma dúvida sobre o exame.

• hoje: today
• ter: to have
• o exame: the exam
• não: not
• sobre: about
• a dúvida: the doubt
• nenhuma: any

Questions & Answers about Hoje não tenho nenhuma dúvida sobre o exame.

Why does the sentence start with Hoje? Could it go somewhere else?

Yes. Hoje means today, and Portuguese often places time expressions at the beginning for emphasis or to set the scene first.

So:

• Hoje não tenho nenhuma dúvida sobre o exame.
• Não tenho nenhuma dúvida sobre o exame hoje.

Both are possible, but they are not always identical in emphasis:

• Hoje at the start sounds like As for today...
• hoje at the end can sound more like it modifies the whole statement in a less prominent way.

Beginning with Hoje is very natural.

Why is não placed before tenho?

In Portuguese, não normally goes directly before the verb it negates.

So:

• tenho = I have
• não tenho = I do not have / I don't have

This is the standard position for negation in simple sentences.

Examples:

• Não sei. = I don’t know.
• Não quero. = I don’t want.
• Não tenho tempo. = I don’t have time.

Unlike English, Portuguese does not use do for this kind of negation.

What form is tenho?

Tenho is the 1st person singular present indicative of the verb ter (to have).

Conjugation of ter in the present:

• eu tenho = I have
• tu tens = you have
• ele/ela/você tem = he/she/you have
• nós temos = we have
• vós tendes = you have
• eles/elas/vocês têm = they/you have

Here, tenho matches an understood eu (I), which is usually omitted because the verb ending already shows the subject.

So the full sentence could be:

• Hoje eu não tenho nenhuma dúvida sobre o exame.

But normally eu is left out unless you want emphasis.

Why does Portuguese use tenho here instead of something like estou?

Because Portuguese commonly uses ter (to have) in expressions where English also says have:

• ter dúvidas = to have doubts
• ter medo = to be afraid / have fear
• ter razão = to be right
• ter fome = to be hungry

So não tenho nenhuma dúvida literally follows a very normal Portuguese pattern: I do not have any doubt.

Using estar here would not work.

Why is it nenhuma dúvida and not just alguma dúvida?

Because Portuguese usually uses a negative word together with the verb negation.

So:

• não tenho nenhuma dúvida = I don’t have any doubt / I have no doubt

This is standard Portuguese, not an error.

English usually avoids double negatives in standard usage, but Portuguese does not work the same way here.

Compare:

• Não vi ninguém. = I didn’t see anyone.
• Não disse nada. = I didn’t say anything.
• Não tenho nenhuma dúvida. = I don’t have any doubt.

You may also hear:

• não tenho dúvida nenhuma

This means the same thing. Portuguese allows the negative element before or after the noun in expressions like this.

Why is it nenhuma and not nenhum?

Because dúvida is a feminine noun.

So the negative determiner must agree with it:

• nenhum
  • masculine singular noun
• nenhuma
  • feminine singular noun

Examples:

• nenhum problema = no problem / not any problem
• nenhuma dúvida = no doubt / not any doubt

Agreement is very important in Portuguese.

Why is dúvida singular? Could it be plural?

Yes, plural is possible in some contexts, but the singular is very natural here.

Não tenho nenhuma dúvida is a common idiomatic way to say:

• I have no doubt
• I don’t have any doubt

It refers to doubt in a general or abstract sense.

You could also hear:

• Não tenho dúvidas sobre o exame.

That also sounds natural and means almost the same thing.

A rough difference:

• não tenho nenhuma dúvida = not a single doubt
• não tenho dúvidas = I have no doubts

In everyday use, both are common.

Why is it sobre o exame? Does sobre just mean about here?

Yes. Here sobre means about / concerning.

So:

• dúvida sobre o exame = doubt about the exam

This is a very normal use of sobre.

Other possibilities can exist depending on style, such as:

• acerca do exame = concerning the exam
• em relação ao exame = in relation to the exam

But sobre o exame is simple, common, and natural.

Why is there an article in o exame? English often just says the exam or sometimes simply about exams.

Portuguese uses definite articles very often, especially with specific nouns that are understood in context.

So o exame means:

• the exam

This suggests a specific exam that both speaker and listener know about.

Without the article, sobre exame, the phrase would sound incomplete or unnatural in this sentence.

Why doesn’t sobre + o contract into one word?

Because sobre normally does not contract with the definite article.

So you say:

• sobre o exame
• sobre a matéria

This is different from prepositions like:

• de + o = do
• em + o = no
• a + o = ao

Examples:

• do exame = of the exam
• no exame = in/on the exam
• ao exame = to the exam

But with sobre, it stays separate:

• sobre o exame

Could I say Hoje, não tenho nenhuma dúvida sobre o exame with a comma?

You can, but in normal writing the comma is usually not necessary.

• Hoje não tenho nenhuma dúvida sobre o exame. is the standard neutral version.

A comma after Hoje may be used if the writer wants to mark a pause or give the sentence a slightly more deliberate rhythm, but it is not required.

So for a learner, the safest choice is:

• Hoje não tenho nenhuma dúvida sobre o exame.

Does Hoje imply a contrast, like maybe I had doubts before?

Often, yes. Starting with Hoje can suggest a contrast with another time, even if it is not stated explicitly.

For example, it may imply:

• before, I was uncertain
• now, I am not

So the sentence can carry a nuance like:

• Today, I have no doubt about the exam.

That contrast is not mandatory, but it is a very natural possible reading.

How is this sentence pronounced in European Portuguese?

A careful European Portuguese pronunciation would be roughly:

• Hoje ≈ OH-zh(uh)
• não tenho ≈ now TEN-yoo / in fast speech the vowels are more reduced
• nenhuma dúvida ≈ nuh-NYOO-muh DOO-vi-duh
• sobre o exame ≈ SOH-bruh oo ig-ZA-muh

A few useful pronunciation notes for Portugal:

• j in hoje sounds like the s in measure
• nh in nenhuma is like ny in canyon
• unstressed vowels are often reduced in European Portuguese
• exame is stressed on za: e-XA-me

If you want, I can also give you a more precise European Portuguese pronunciation guide using IPA.