Answer:
Ser present tense
<em>Yo</em> soy
<em>Tú</em> eres
<em>Él/ella/ud.</em> es
<em>Nosotros</em> somos
<em>Vosotros</em> sois
<em>Ellos/ellas/uds.</em> son
Ser preterite tense (past)
<em>Yo</em> fui
<em>Tú</em> fuiste
<em>Él/ella/ud.</em> fue
<em>Nosotros</em> fuimos
<em>Vosotros</em> fuisteis
<em>Ellos/ellas/uds.</em> fueron
Ser imperfect tense (different type of past tense)
<em>Yo</em> era
<em>Tú</em> eras
<em>Él/ella/ud.</em> era
<em>Nosotros</em> éramos
<em>Vosotros</em> erais
<em>Ellos/ellas/uds</em>. eran
Estar present tense
<em>Yo</em> estoy
<em>Tú </em>estás
<em>Él/ella/ud.</em> está
<em>Nosotros</em> estamos
<em>Vosotros</em> estáis
<em>Ellos/ellas/uds.</em> están
Estar preterite tense (past)
<em>Yo</em> estuve
<em>Tú </em>estuviste
<em>Él/ella/ud.</em> estuvo
<em>Nosotros</em> estuvimos
<em>Vosotros</em> estuvisteis
<em>Ellos/ellas/uds</em>. estuvieron
Estar imperfect tense (different type of past tense)
<em>Yo</em> estaba
<em>Tú</em> estabas
<em>Él/ella/ud</em>. estaba
<em>Nosotros</em> estábamos
<em>Vosotros </em>estabais
<em>Ellos/ellas/uds. </em>estaban
Explanation:
To complete this exercise, you have to write the present and past tenses forms of the verbs "ser" and "estar".
The exercise explains that you have to do it with four verbs times but it does not clarify which verbs times because there are more than four in the Spanish language. I wrote the Spanish simple present tense, the Spanish preterite tense and the Spanish imperfect tense.
The <u>Spanish simple present tense</u> (''presente del indicativo'' in Spanish) is used to talk about habitual situations, routines, universal truths, facts and things happening now or in the near future.
Then, on one hand, you use the <u>Spanish preterite tense </u>("pretérito perfecto simple" in Spanish) to talk about actions completed at some point in the past. On the other hand, you use the <u>Spanish imperfect tense</u> ("pretérito imperfecto" in Spanish) to talk about past habitual actions or to talk about what someone was doing but then got interrupted with something else.