I am wondering about the use of the object 'lo' with infinitives, and also the simple future (using ir).

Which is preferred in these examples, and why?

  • "Voy a lanzarlo" vs "Lo voy a lanzar"

  • "Voy a comerlo" vs "Lo voy a comer"

  • etc.

I feel like I prefer the lanzarlo/comerlo version but am I correct? Are both acceptable? Is there ever an acceptable situation for "Lo voy a ....."?


1 Answer 1


Both are acceptable, correct, and both are used in free variation by native speakers, i.e. the same speaker will use either in any context without any reason, randomly.

  • 2
    You may want to add that historically, only "Voy a tirarlo" would have been considered correct at the beginning of an utterance, but nowadays it is more common (as evidenced by Google books) to prefer proclisis. Mar 24, 2017 at 12:19
  • I'd only add that the pronoun in front position makes the DO slightly stronger than in end position: A: Quiero que lo tires ya - B: Ya dije que LO voy a tirar (slight emphasis on what is being thrown away rather than on the action of throwing - anything - away).
    – Gustavson
    Mar 25, 2017 at 2:38
  • @Gustavson, that might be true in some cases, but I think that it does not usually make any difference. Do you have any references to that?
    – Paco
    Mar 26, 2017 at 4:37
  • 1
    @Paco At the bottom of footnote 1 on the first page of this paper (google.com.ar/url?sa=t&source=web&rct=j&url=https://…) I found something in line with my view: Creo que, cuando el pronombre se antepone a la perífrasis, tal vez el hablante trata de poner mayor énfasis en el pronombre; mientras que cuando éste se pospone, quizá desea dar mayor relieve a la acción expresada por el sintagma.
    – Gustavson
    Mar 27, 2017 at 23:02
  • 1
    @Wences "a" will only be used with inanimate nouns after the verb with prepositional verbs, in which case "a" will introduce the complement known as complemento de régimen, for example: A eso hay que acceder cuanto antes . (Hay que acceder a eso). Notice that this does not apply to the case in question. where "eso" is the direct object: * A esto lo voy a tirar / Lo voy a tirar a esto. (wrong)
    – Gustavson
    Mar 29, 2017 at 13:57

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