Can you provide examples of sentences where the passive voice is appropriate and effective?

Certainly! Here are some examples of sentences where the passive voice can be appropriate and effective:

1. When the doer of the action is unknown or unimportant:

   - The Mona Lisa was painted in the 16th century. (We don't know who exactly painted it.)

   - The laptop was stolen from my office. (The focus is on the fact that it was stolen, not on who stole it.)

2. When the receiver of the action is the main focus:

   - The cake was eaten in minutes. (Emphasizing the cake and its consumption rather than who ate it.)

   - The proposal was accepted by the committee. (Highlighting the committee's decision rather than who accepted it.)

3. When discussing scientific or technical processes:

   - The experiment was conducted to test the hypothesis. (Focusing on the experiment rather than who conducted it.)

   - The data were analyzed using statistical software. (Highlighting the analysis process rather than who performed it.)

4. When adding variety or avoiding repetition:

   - The book was written by a renowned author. In contrast, the movie was directed by a newcomer. (Varying the sentence structure and adding emphasis to different aspects of the sentence.)

5. When the agent is implied or known from context:

   - The window was broken. (It is implied that someone or something broke the window, but the specific agent is not mentioned.)

Remember, while the passive voice can be appropriate in certain contexts, it's generally advisable to use the active voice whenever possible. The active voice is usually more direct, concise, and engaging. Use the passive voice strategically to convey specific meanings or to shift the focus of a sentence.