1.3 主动语态变被动语态

1. 现象：忘记变be动词，直接写成 "The book was read by me." 但原句是 "I read the book yesterday."（过去时）却写成 "The book is read by me."。
后果：时态错误，导致句子逻辑不通。
怎么纠正：强调“be动词的时态必须与原句谓语动词时态一致”，先判断原句时态，再选be。

2. 现象：在被动语态中保留 "by + 人称代词宾格"，如 "I was hit by him." 写成 "I was hit by he."。
后果：语法错误，介词后必须接宾格。
怎么纠正：强调介词 by 后必须接宾语形式（me, him, her, us, them）。

3. 现象：混淆不可逆动词，如 "The door opened." 误改为 "The door was opened by someone." 或 "He died." 误改为 "He was died."
后果：语义错误，部分动词无被动语态。
怎么纠正：列举常见不可被动化动词（如 die, happen, lose, belong, fit, suit），强调这些动词只用于主动语态。