被动语态和主动语态是英语语法中的两种基本语态，被动语态表示主语是动作的接受者，主动语态表示主语是动作的执行者。在英语写作中，经常需要将被动语态转换为主动语态，使句子更直接、生动和精确。例如，“The cake was baked by my mom”可以转换为“My mom baked the cake”。
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被动语态：The cake was baked by my mom. 主动语态：My mom baked the cake.
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被动语态：The letter was written by John. 主动语态：John wrote the letter.
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被动语态：The book will be read by the students. 主动语态：The students will read the book.
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被动语态：The movie was watched by millions of people. 主动语态：Millions of people watched the movie.
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被动语态：The report has been written by the staff. 主动语态：The staff have written the report.
