#present perfect subjunctive

[spanishavngas]

Pretérito perfecto de subjuntivo (Present Perfect Subjunctive)

Verbo auxiliar + Verbo principal -> ¿Para que lo usamos?

[risingjunior-blog]

USE present perfect subjunctive when it is necessary to use subjunctive (when you have que), the main clause is present, but you want the second clause to be in the past

-es posible que haya ido todos los dias. present perfect subjunctive

-es posible que vaya al practico todos los dias. present subjunctive

-si hubiera pedido su maestra, el habria sabido sobre la pruebita. past perfect subjunctive

-talk to ms. m about impf subjunctive

[risingjunior-blog]

Help with the present perfect subjunctive

http://www.elearnspanishlanguage.com/grammar/verb/presentperfectsubjunctive.html

The present perfect subjunctive, also known as the past or perfect subjunctive, is used when a verb or expression requiring the subjunctive in the main clause is in the present, future, or present perfect. You might notice that the same definition holds true for the regular (present) subjunctive, so what's the difference? The present subjunctive is used when the dependent clause is in the present or future, while the present perfect subjunctive is used when the dependent clause is in the past.

For example, if you want to say "I doubt you'll do it," you'd use the present subjunctive: Dudo que lo hagas. But if you wanted to say "I doubt that you did it," you'd use the present perfect subjunctive: Dudo que lo hayas hecho.

Another example: "It's good that he is studying" - Es bueno que estudie vs "It's good that he studied" - Es bueno que haya estudiado.

[risingjunior-blog]

SUBJUNCTIVE TENSES

PAST PERFECT-->PRESENT-->PRESENT PERFECT -->..IMPERFECT

hubiera----> switch endings-----> haya-------> ....-eron/-ieron drop -ron add ra

WHEN TO USE WHATT?!

   -We use past perfect subjunctive when we express regret, wishes, and in si

     clauses with conditional perfect.

   -We use present subjunctive when we deal with situations of doubt, desire,

     emotion, ONLY AFTER QUE.

   -We use present perfect subjunctive when we describe an action that

    happened in the past and continues or repeats into the present or an action

    that "has" happened in the recent past. have done something

   -We use imperfect subjunctive if the first clause is in the imperfect or

    preterite, the first clause refers to a previous occurence, unlikely events