<span>The perfect form is the verb tense used to indicate a completed, or "perfected," action or condition. Verbs can appear in any one of three perfect tenses: presentperfect, past perfect, and future perfect. Verbs in the perfect form use a form of "have" or "had" + the past participle.</span>
Answer:
The answer to your question would be that the version of the sentence that uses the preposition to show location is the following one: The unexpected blackout occurred near the masquerade ball.
Explanation:
The preposition showing location in the sentence above is <em>near.</em> This preposition means "not far away in distance". All the other versions of the sentence use the prepositions to give information as regards the time in which the event being referred to took place (before, during, and after).
