If a Spanish verb has a regular past participle we say this verb is regular in the perfect tenses because perfect tenses conjugations use the past participle of the main verb.
Learn how to conjugate regular verbs in El Pretérito Perfecto Subjuntivo in Spanish
|él/usted||haya||+ past participle|
The auxiliary verb haber is conjugated in the present subjunctive, which is irregular, with stem hay- , and it's followed by the regular past participle of the main verb.
Read and listen to these regular verbs conjugated in El Pretérito Perfecto Subjuntivo:
Remember how to form regular -ar, -er and -ir past participles:
habl-ar -> habl-ado
com-er -> com-ido
viv-ir -> viv-ido
1. Conjugate haber in the present subjunctive in Spanish (El Presente de Subjuntivo)
2. Conjugate Spanish verbs hacer, escribir, poner in the present perfect subjunctive in Spanish (El Pretérito Perfecto de Subjuntivo)
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