The present perfect subjunctive is formed using the formula below:
present subjunctive conjugation of haber + the past participle = present perfect subjunctive
The table below shows the present subjunctive conjugation of the helping verb haber.
The past participle of ver (to see) is irregular - visto.
Below are examples of the present perfect subjunctive. Note that there are two possible English translations for each example.
haya visto - I saw (or) I have seen
hayas visto - you saw (or) you have seen
hayamos visto - we saw (or) we have seen
The present perfect subjunctive is used in the same types of clauses as the present subjunctive, and normally is used: to indicate the action as completed with governing verbs in the present or future tense or command forms. Let's look at some example sentences:
Por muchas que hayas visto, debes ir a ver ésta.
However many you've seen, you should go and see this one (film).
Tal vez no se haya ido.
Perhaps he/she has not left.
Es improbable que no se haya dado cuenta.
It's unlikely that he/she has not realized it.
Ha robado mi monedero sin que yo me haya dado cuenta.
He/she had stolen my change purse without me having realized it.
No hay nadie que lo haya visto.
No one has seen it.
Prefiero que me lo hayas dicho.
I prefer that you have told me it.
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