The preterite -er verb in the provided sentence is "comieron." Here's how we can identify it:
1. The preterite tense in Spanish is used to talk about actions that were completed in the past.
2. Verbs ending in -er have a specific conjugation pattern in the preterite tense.
3. In the sentence "Tomás y Angel comieron mariscos anoche," the word "comieron" is the conjugated form of the verb "comer" in the preterite tense.
4. The "-ieron" ending is a common indicator of the preterite tense for regular -er verbs.
Therefore, "comieron" is the preterite -er verb in the sentence provided.
