Answer:
The only sentence that is in the passive voice is "The teeter-totter was shared by the boys." Changed into the active voice, it becomes:
- The boys shared the teeter-totter.
Explanation:
Let's break the transition between voices down:
1. Find the subject of the passive voice. It becomes the object in the active voice. In this case, it is "the teeter-totter".
2. Find the agent of the passive voice. It becomes the subject in the active voice. The preposition "by" is removed. In this case, it is "(by) the boys".
3. Determine what the tense of the verb "to be" in the passive voice is. In this case, it is simple past.
4. Change the main verb to the same tense as determined above: shared.
Therefore, we have:
The boys shared the teeter-totter.
