What's the difference between:

  • (1) te avisarei

  • (2) avisar-te-ei

  • (3) avisarei-te (if this is even correct?)

Are they interchangable?

1 Answer 1


Avisarei-te is nonstandard; otherwise, all three mean the same. The choice between avisar-te-ei and te avisarei has to do with syntax and the presence of adverbs. For instance, in a simple main clause I would say:

Fica descansado, eu avisar-te-ei quando ele chegar

but in a subordinate clause (all in boldface),

Fica descansado, eu já disse que te avisarei quando ele chegar

This is so in European Portuguese and (very?) formal Brazilian Portuguese. In colloquial Brazilian Portuguese, the pronoun comes before the verb nearly all the time. See this question about the placement of these pronouns.

The distribution between avisar-te-ei and te avisarei is the same as between aviso-te and te aviso. The reason we have the pronoun in the middle of the verb rather than at the end is that the -ei is a remnant of the auxiliary verb haver (same with ia in avisar-te-ia); so a long time ago the te would be at the end of the main verb (avisar-te hei) just as in aviso-te.

In practice, you won’t hear avisar-te-ei that much (or te avisarei, for that matter), because we tend to replace the simple future with the present or ir + infinitive. Say, rather than the examples above, I would much more likely say:

Fica descansado, eu aviso-te quando ele chegar
Fica descansado, eu já disse que te aviso quando ele chegar

  • How is avisar-te-ei pronounced? As 3 distinct words? Or do "te-ei" get merged into a single world similar to "teei"? Commented Jun 29, 2022 at 12:35
  • 2
    @Nicholas, it is pronounced as a single word. You can listen to amar-te-ei here, same sound.
    – Jacinto
    Commented Jun 29, 2022 at 13:05
  • 1
    I'd bet that in written Iberian Portuguese, yes, but spoken? Not often, right?
    – Lambie
    Commented Jun 29, 2022 at 15:00
  • @Lambie, right, not common at all. I'd hoped I had addressed that point, at the end... or are you talking of something else?
    – Jacinto
    Commented Jun 29, 2022 at 21:37
  • 1
    @FabricioG Hey, don't diss my technical texts and reports! I use "constituir-se-ão" and similar phrases as often as I should, since it is the only grammatically correct form available.
    – Piovezan
    Commented Aug 25, 2022 at 23:12

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.