El presente perfecto

The present perfect tense is called

• a compound tense
• a simple past tense

The present perfect is formed by 

• adding the preterite and the imperfect
• addidng the verb HABER and the past participle
• adding the verb HABER
• adding the past participle

The past participle is formed by adding -ado to the stem of 

• -ar verbs 
• -ir verbs 
• -er verbs
• -ar, -er and -ir verbs 

The past participle is formed by adding -ido to the stem of 

• -er verbs 
• -er and -ar verbs 
• -er and -ir verbs 
• -ir verbs 

The present perfect tense is used when 

• speaking of a past event without reference to any particular time. 
• speaking of a present event.
• speaking of a past event.
• speaking of a future event referencing the past. 

The verb HABER and the past participle

• are never separated
• are always separated 
• used frequently
• are regular 

Hoy yo (salir) del trabajo a las 2.

• he salido

• has salido

• salí

• he salto

Mis padres (ver) esta mañana a Juan en la farmacia.

• han visto

• has visto

• han vido

• ver

Este mes (hacer) mucho calor en toda España.

• ha hecho

• he hecho

• has hecho

• ha hacido

Nosotros (vivir) aquí desde que éramos pequeños.

• hemos vivido

• hamos vivido

• hemos visto

• han vivido