1. Right answer:
oigo
Oigo is the conjugation of the verb oír that matches the first person singular (this person is yo - I in English) in the simple present. The simple present tense is used to talk about habitual actions or routines. This tense is also used to describe things that happen now or in the near future. Therefore, this sentence can be written as follows:
Yo oigo (I hear)
2. Right answer:
tú oyes
Oyes is the conjugation of the verb oír that matches the second person singular (this person is tú - you in English) in the simple present. It is important to say that the verb oír is an irregular verb. For irregular verbs, you need to learn by heart conjugations for each tense. Finally, this sentence can be written as follows:
Tú oyes (You hear)
3. Right answer:
oye
Oye is the conjugation of the verb oír that matches the third person singular in the simple present. There are two cases, first when the person is given in masculine form, then we use the subject pronoun él (he). Second, when the person is given in feminine form, then we use the subject pronoun ella (she). On the other hand, this conjugation also matches the second person singular in formal form, which is usted. Therefore, we have:
Él oye (He hears)
Ella oye (She hears)
Usted oye (You hear)
4. Right answer:
oímos
Oímos is the conjugation of the verb oír that matches the first person plural in the simple present. This person is nosotros and translates into we in English. So nosotros is used by a speaker to point out to himself or herself and one or more other people considered together. Finally:
Nosotros oímos (We hear)
5. Right answer:
oís
Oís is the conjugation of the verb oír that matches the second person plural in the simple present. The word vosotros is common in Spain and is used in informal way. In other Spanish speaking countries this pronoun is less common. Finally, we can write this sentence as follows:
Vosotros oís (You hear)
6. Right answer:
oyen
Oyen is the conjugation of the verb oír that matches the third person plural in the simple present. There are two cases, first when the people are men, then we use the subject pronoun ellos (or even women and men). Second, when the people are women, then we use the subject pronoun ellas. Both ellos and ellas translates into they. On the other hand, this conjugation also matches the second person plural, which is ustedes. Therefore, we have:
Ellos oyen (They hear)
Elloas oyen (They hear)
Ustedes oyen (You hear)