1.
fill the blank with the preterite tense of the verb in parentheses.
usted
a la tienda por teléfono. (llamar) (1 point)

2.
fill the blank with the preterite tense of the verb in parentheses.
los alumnos no
anoche. (estudiar) (1 point)

3.
fill the blank with the preterite tense of the verb in parentheses.
la profesora
a los alumnos. (mirar) (1 point)

4.
fill the blank with the preterite tense of the verb in parentheses.
julia y marcos
la televisión anoche. (mirar) (1 point)

5.
fill the blank with the preterite tense of the verb in parentheses.
yo
a mi abuela la semana pasada. (visitar) (1 point)

6.
fill the blank with the preterite tense of the verb in parentheses.
los señores
a la banda ayer. (escuchar) (1 point)

7.
fill the blank with the preterite tense of the verb in parentheses.
tú
con susana en la fiesta anoche. (cantar) (1 point)

8.
change this verb from the present tense to the preterite tense.
yo empiezo (1 point)

9.
fill the blank with the preterite tense of the verb in parentheses.
ellos
a trabajar. (empezar) (1 point)

10.
change this verb from the present tense to the preterite tense.
ella empieza (1 point)

11.
fill the blank with the preterite tense of the verb in parentheses.
yo
una buena nota. (sacar) (1 point)

12.
change this verb from the present tense to the preterite tense.
yo saco (1 point)

13.
change this verb from the present tense to the preterite tense.
yo pago (1 point)

14.
change this verb from the present tense to the preterite tense.
tú estudias (1 point)

15.
change this verb from the present tense to the preterite tense.
ramón llama (1 point)

16.
change this verb from the present tense to the preterite tense.
nosotros pagamos (1 point)

17.
change this verb from the present tense to the preterite tense.
los amigos cantan (1 point)

18.
change this verb from the present tense to the preterite tense.
ella lava (1 point)

19.
change this verb from the present tense to the preterite tense.
raúl estudia (1 point)

20.
change this verb from the present tense to the preterite tense.
mi familia baila (1 point)

In this problem, we'll use two tenses:

Therefore:

Usted  llamó a la tienda por teléfono

llamó is the conjugation of the regular verb llamar for the second person singular (formal you) in the preterite tense. The regular preterite verb endings of regular verbs are indicated in the Table bellow. The ending that matches this pronoun is ó.

Los alumnos no  estudiaron anoche

estudiaron is the conjugation of the regular verb estudiar for the third person plural in the preterite tense. See from the Table bellow the ending that matches this pronoun is aron.

La profesora miró a los alumnos

miró is the conjugation of the regular verb mirar for the third person singular in the preterite tense. By the way, you can recognize only two sets of endings for regular preterite verbs, one for ar verbs and one for both er and ir verbs. The rule to conjugate a regular verb in the preterite tense is to remove the infinitive ending (ar, er, or ir) and add the preterite ending that matches the subject as indicated in the Table bellow.

Julia y Marcos miraron la televisión anoche

miraron is the conjugation of the regular verb mirar for the third person plural in the preterite tense.

Yo  visité a mi abuela la semana pasada.

visité is the conjugation of the regular verb visitar for the first person singular in the preterite tense. See from the Table that the ending that matches this subject pronoun is é.

Los señores escucharon a la banda ayer

escucharon is the conjugation of the regular verb escuchar for the third person plural in the preterite tense. See from the Table that the ending that matches this subject pronoun is aron.

Tú  cantaste con Susana en la fiesta anoche.

cantaste is the conjugation of the regular verb cantar for the second person singular in the preterite tense. See from the Table that the ending that matches this subject pronoun is aste.

Yo empecé

To change this verb from the present tense to the preterite tense, we only need to change the conjugation of this irregular verb. So empiezo in the present tense changes to empecé in the preterite tense.  

Ellos empezaron a trabajar

empezaron is the conjugation of the irregular verb empezar for the third person plural in the preterite tense.

Ella empezó a trabajar

empezó is the conjugation of the irregular verb empezar for the third person plural in the preterite tense.

Yo saqué una buena nota.

saqué is the conjugation of the irregular verb sacar for the first person singular in the preterite tense. Since this is an irregular verb, you need to memorize each conjugation.

Yo  saqué

As is in question 11, the subject pronoun here is yo  (first person singular), therefore the conjugation is the same as in the previous exercise.

Yo  Pagué

The conjugation of the verb pagar for the first-person singular is pagué in the preterite tense. In simple present is pago.

Tú estudiaste

The conjugation of the verb estudiar for the second-person singular is estudiaste in the preterite tense. In simple present is estudias.

Ramón llamó

The conjugation of the verb llamar for the third-person singular is llamó in the preterite tense. In simple present is llama.

Nosotros pagamos

The conjugation of the verb pagar for the first person singular is the same in both the simple present and the preterite tense.

Los amigos cantaron

The conjugation of the verb cantar for the third-person plural is cantaron in the preterite tense. In simple present is cantan.

Ella lavó

The conjugation of the verb lavar for the third-person singular is lavó in the preterite tense. In simple present is lava.

Raúl estudió

The conjugation of the verb estudiar for the third-person singular is estudió in the preterite tense. In simple present is estudia.

Mi familia bailó

The conjugation of the verb bailar for the third-person singular is bailó in the preterite tense. In simple present is baila.

los abuelos de carlos y liza podrían ser cualquiera de las opciones, necesitamos más información para resolver esto. esperaba que esto ayudara un poco al menos.