John Duns Scotus

On the Beatific Vision

Latin Grammar: Complementary infinitives

Ex ista distinctione ad propositum: Actus beatificus intellectus non potest esse cognitio abstractiva, sed necessario intuitiva, quia abstractiva est aeque existentis et non existentis, et sic beatitudo potest esse in obiecto non existente, quod est impossibile...

Complementary Infinitives

Many verbs take a complementary infinitive when they imply another action taken by the same subject. In these cases, there is no accusative subject expressed and instead the same subject is assumed for both the finite verb and the complementary infinitive.

The verbs that take a complementary infinitive need the infinitive to complete their meaning and include verbs that denote, among other things:

  • to be able (possum)
  • to dare (audeo)
  • to undertake (suscipio)
  • to remember (memini)
  • to forget (obliviscor)
  • to be accustomed (soleo)
  • to begin (coepi)
  • to continue (pergo)
  • to cease (desino)
  • to learn (nosco)
  • to know how (scio)
  • to fear (metuo)

Translate the following English sentences into Latin using a complementary infinitive.

1. I am able to do this. .
2. I ceased to hear you. .
3. I fear to say this. .
4. I began to leave. .
5. I dared to stay. .

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