In which of the following do you not use the verb SER?

In the following:

- Present progressive tense: This tense is used to talk about actions happening in the present moment, such as "I am running." In this formation, the verb "ser" is not used, as it is replaced by the verb "estar" (to be) conjugated in the present indicative tense.

- Preterite past tense: The preterite tense is used to talk about completed actions in the past. In this formation, the verb "ser" is not used. Instead, different conjugations of "ser" (fui, fuiste, fue, fuimos, fueron) are used to indicate the simple past tense.

- Future tense: The future tense is used to talk about actions that will happen in the future. In this formation, the verb "ser" is not used. Instead, different conjugations of "ser" (seré, serás, será, seremos, serán) are used to indicate the future tense.

- Conditional tense: The conditional tense is used to talk about hypothetical or uncertain actions. In this formation, the verb "ser" is not used. Instead, different conjugations of "ser" (sería, serías, sería, seríamos, serían) are used to indicate the conditional tense.