Answer:
Step-by-step explanation:
1. Hemos conocido a varios bolivianos este año. (tú)
Has conocido a varios bolivianos este año.
2. Gilberto ha disfrutado de sus vacaciones. (yo)
He disfrutado de mis vacaciones.
3. ¿Has ido al museo de arte de Boston? (ustedes)
¿Ustedes han ido al museo de arte de Boston?
We have three verbs in previous sentences:
Conocer -- to know someone, to meet someone. Belongs to the second group of verbs, as it ends in ER. It is a regular verb, with an exception in the first person singular form, yo conozco. The verb conocer is in the first person singular form, in the perfect tense. In the second example, the verb conocer is in the first person singular form, also in the perfect tense.
Disfrutar -- to enjoy. Belongs to the first group of verbs as it ends in AR. It is a regular verb. This verb in the previous sentences is used in the second person singular form, in the perfect tense. In the example number two, it is used in the first person singular form, also in the perfect tense.
Ir -- to go. It is an irregular verb, and it belongs to the third group of verbs. This verb was used in sentence number three. In the first example, the verb is used in the second person singular form, in the perfect tense. In the second example, the verb is used in the third person plural form, also in the perfect tense.