在英语语法中，主动语态和被动语态是常见的两种语态形式。当我们想要表达动作的执行者时，我们使用主动语态，而当我们想要强调动作的承受者时，我们使用被动语态。下面是一些将主动语态改为被动语态的例句：
-
主动语态：The teacher corrected the mistakes. 被动语态：The mistakes were corrected by the teacher.
-
主动语态：The company will launch a new product next month. 被动语态：A new product will be launched by the company next month.
-
主动语态：She is making a cake for her friend’s birthday party. 被动语态：A cake is being made for her friend’s birthday party by her.
-
主动语态：They have built a new bridge across the river. 被动语态：A new bridge has been built across the river by them.
-
主动语态：The police arrested the suspect last night. 被动语态：The suspect was arrested by the police last night.
通过以上例句的对比，我们可以更好地理解主动语态和被动语态的区别和用法。在实际运用中，我们需要根据上下文和表达意图来选择适当的语态形式，以便更好地传达信息和表达思想。
