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2014人教版九年级英语unit6 When was it invented重点知识点讲解及练习


Unit6 When was it invented? 1、 被动语态 (1). 被动语态表示句子的主语是谓语动词所表示的动作承受者。 (2). 被动语态基本结构:be+及物动词的过去分词 (如果是不用物动词,其过去分词应带有相应的介词) (3). 被动语态中的 be 是助动词,有人称、数和时态的变化。 一般现在时被动语态为:am/is/are+过去分词 一般过去时被动语态为:w

as/were+ 过去分词 与情态动词连用的被动语态:情态动词+ be + 过去分词 (4). 被动语态中动作的发出者或执行者做介词 by 的宾语,放在句 末,by 表示“由,被”的意思 2、如何理解被动语态? 为取胜更清晰、更深刻地理解被动语态的含义,可以将主动语态和被动语态的句子结构进 行比较。 主动语态: 主语+ 谓语动词 + 宾语 + 其他成分 被动语态: 主语+ 如: be +过去分词 + by +宾语 +其他成分 Many people speak English. 被动语态 English is spoken by many people. 3. invent v. 发明 inventor n. 发明家 invention n. 发明 可数名词 4. be used for doing 用来做…(是被动语态) 如: Pens are used for writing. 笔是用来写的。 Pens aren’t used for eating. 笔不是用来吃的。 5. 给某人某样东西 give sth. to sb. 如:I gave a pen to him. 我给他一支笔。 give sb. sth. I gave him a pen. 我给他一支笔。 6. all day 整天 7. salty adj. 咸的 salt n. 盐 8. by mistake 错误地 如: I took the umbrella by mistake. 我不小心拿错了雨伞。 9. make sb./sth. +形容词 使…怎么样 It made me happy. 它使我高兴 make sb./sth. +名词 让…做… It made me laugh. 它让我发笑 10. by accident 意外 偶然 I met her by accident at bus stop. 11. not…until… 直到…才做… 如: I didn’t go to bed until I finished my work. 12. according to +名词 根据… 如: according to an legend according to this article 根据这篇文章 根据一个神话 13. over an open fire 野饮 14. leaf n. 叶子 复数形式 leaves 15. nearby adj. 附近的 如: the nearby river 16. fall into 落入 掉进 如:The leaf fell into the river. 叶子落入了河里。fall down 摔倒 She fell down from her bike. 1 如: 17. quite 非常 adv. 与冠词 a 连用时,冠词 a 必须放在它的后面 如: quite a beautiful girl 一个漂亮的女孩 very 非常 adv. 与冠词 a 连用时,冠词 a 必须放在它的前面 如: a very beautiful girl 一个

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