B1 中级
被动语态 (Passive voice)
被动语态把动作的承受者放在句子开头,用于不知道、不重要或不想说是谁做的时候:Tea is grown in Yunnan. The bridge was built in 1990. 结构是 be + 过去分词;要说明做动作的人时用 by:The book was written by a young teacher.
结构
am / is / are / was / were + past participle (+ by …)
常见错误
漏掉 be 动词。
The cake made by my mother.
The cake was made by my mother.