Final answer:
The imperfect form of the verb in the sentence is correct as written.
Step-by-step explanation:
The imperfect form of the verb in the sentence is correct as written. The sentence 'Mi familia fuera la más grande' is in the imperfect tense, which is used to describe past actions or ongoing past states in Spanish. The verb 'fuera' is the imperfect form of the verb 'ser' (to be), and it agrees in number and gender with the subject 'mi familia' (my family).
Learn more about Imperfect tense in Spanish