Final answer:
The verb 'era' is not an Imperfect verb in the given sentence. 'Buena' is an adjective, not a verb.
Step-by-step explanation:
In the sentence provided, the verb 'era' (meaning 'was') is not an Imperfect verb. Imperfect verbs in Spanish usually end in -aba, -ía, or -ía. Examples of Imperfect verbs in this sentence include 'era' ('was') and 'hacía' ('was doing' or 'made'). On the other hand, 'buena' is not a verb at all, but rather an adjective meaning 'good' or 'nice'.
Learn more about Imperfect verbs in Spanish