Final answer:
The sentence 'Lightning struck the sky' is already in the active voice with 'lightning' as the subject performing the action. The subject of the sentence, in this case, is doing the action, which is indicative of the active voice.
Step-by-step explanation:
To change the sentence 'Lightning struck the sky' into the active voice, it is important to recognize that the sentence is already in the active voice.
In this sentence, 'Lightning' is the subject performing the action of striking the sky.
Active-voice verbs make the sentence more direct and dynamic because they ensure that the subject of the sentence performs the action.
Here, 'lightning' (the subject) performs the action ('struck') on the object ('the sky').
Here are some additional examples:
- The rainfall total was measured using standard practices. → Standard practices measured the rainfall total.
- The electricity was turned off by the power company. → The power company turned off the electricity.
- The vase was broken. → Someone broke the vase.