presente perfecto del subjunctivo

Question 1

what is it?

Answer 1

the present perfect subjunctive is formed by using the present subjunctive form of haber and the past parciple

Question 2

Haber conjugations

Answer 2

haya hayaba
hayas
haya hayan

Question 3

when is it used?

Answer 3

when the action and the dependent clause occurred before the action in the main clause
ex. Im very happy you have come

Question 4

conjugations of other verbs

Answer 4

ado/ido