【《英语语法被动语态》ppt课件】 《英语语法被动语态》PPT课件
一、什么是被动语态?
在英语中,句子的结构可以分为两种:主动语态和被动语态。
- 主动语态:主语是动作的执行者。
- 例句:The teacher explains the grammar rules.
(老师讲解语法规则。)
- 被动语态:主语是动作的承受者。
- 例句:The grammar rules are explained by the teacher.
(语法规则被老师讲解。)
二、被动语态的基本结构
被动语态的构成方式为:
be + 过去分词(past participle)
- 一般现在时:am/is/are + 过去分词
- 例句:The book is written by a famous author.
- 一般过去时:was/were + 过去分词
- 例句:The cake was baked yesterday.
- 现在完成时:have/has been + 过去分词
- 例句:The report has been completed.
- 一般将来时:will be + 过去分词
- 例句:The meeting will be held tomorrow.
三、什么时候使用被动语态?
1. 当动作的执行者不重要或未知时:
- 例句:The window was broken.
(窗户被打碎了。)
2. 当强调动作的接受者时:
- 例句:The new policy is being discussed.
(新政策正在被讨论。)
3. 在正式或书面语中:
- 例句:The results of the experiment were published in a scientific journal.
四、常见的错误与注意事项
1. 混淆动词的过去分词形式:
- 正确:The letter was sent.
- 错误:The letter was send.
2. 遗漏“be”动词:
- 正确:The car is repaired.
- 错误:The car repaired.
3. 误用时态:
- 正确:The house was built in 1990.
- 错误:The house built in 1990.
五、练习与应用
练习题:
1. 将下列句子改为被动语态:
- They are painting the wall.
→ The wall is being painted.
2. 将下列句子改为主动语态:
- The cake was eaten by the children.
→ The children ate the cake.
实际应用示例:
- 在新闻报道中:The accident was caused by a drunk driver.
- 在科技文章中:The data is processed automatically.
六、总结
- 被动语态是一种重要的语法结构,常用于表达动作的接受者。
- 掌握其基本结构和使用场景有助于提升英语表达的准确性和多样性。
- 多加练习,熟练运用被动语态,能够使语言更地道、更正式。
如需进一步扩展内容(如添加图片、图表、互动环节等),也可以继续补充。