英语中，被动语态和主动语态都是常见的语法形式，有时需要将被动语态改为主动语态以更直接地表达意思。例如，“The book was written by John”可以改为“John wrote the book”，“The movie was directed by Steven Spielberg”可以改为“Steven Spielberg directed the movie”等。这样可以使句子更清晰，更生动有趣。
以下是一些被动语态改为主动语态的例子：
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被动语态：The book was written by John. 主动语态：John wrote the book.
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被动语态：The cake was baked by Sarah. 主动语态：Sarah baked the cake.
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被动语态：The window was broken by the storm. 主动语态：The storm broke the window.
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被动语态：The letter was sent by the postman. 主动语态：The postman sent the letter.
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被动语态：The movie was directed by Steven Spielberg. 主动语态：Steven Spielberg directed the movie.
