九年级英语九单元翻译怎么学？

1. 单元核心词汇和短语（中英对照）
2. 核心语法点：过去完成时 的讲解和例句
3. 重点句型
4. 单元主题相关的范文翻译
5. 常见练习题及翻译

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核心词汇和短语

英文	中文	备注
invention	n. 发明，创造
inventor	n. 发明家
influence	v. 影响 / n. 影响
create	v. 创造，创作
develop	v. 开发，研制；发展
improve	v. 改进，提高
by the time	到……的时候	核心短语，引导过去完成时
pioneer	n. 先驱，开拓者
accidental	adj. 意外的，偶然的
crispy	adj. 脆的	常与薯条等食物连用
divide	v. 分开，分割
smell	v. 闻起来	(smelled, smelled/smelt)
salty	adj. 咸的
sweet	adj. 甜的
sour	adj. 酸的
bitter	adj. 苦的
knock into	撞上（某人）
fall off	从……上掉下来
heat up	加热
at the same time	同时
without doubt	毫无疑问
take place	发生
lead to	导致

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核心语法点：过去完成时

定义 过去完成时表示一个动作在过去另一个动作之前就已经完成，过去的过去”。

结构 主语 + had + 动词的过去分词

用法

• 表示“过去的过去”：常与 by the time, before, when 等引导的过去时态的从句连用。

  • 例句: By the time I got to the cinema, the movie had already started.
  • 翻译: 当我到达电影院时,电影已经开始了。
  • 分析: “到达电影院”(got) 是过去发生的，“电影开始”(had started) 是在“到达”这个过去的动作之前完成的,所以用过去完成时。

• 表示过去某一时间之前已经完成的动作。

  • 例句: She told me she had finished her homework.
  • 翻译: 她告诉我她已经完成了作业。
  • 分析: “她告诉我”(told) 是过去，“完成作业”(had finished) 是在“告诉”这个动作之前完成的。

否定句和疑问句

• 否定句: 主语 + had not (hadn't) + 动词过去分词
  • 例句: He hadn't eaten anything before he arrived.
  • 翻译: 他到达之前什么都没吃。
• 疑问句: Had + 主语 + 动词过去分词?
  • 例句: Had you ever seen snow before you moved to Harbin?
  • 翻译: 在你搬到哈尔滨之前,你见过雪吗？

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重点句型

1. 谈论发明过程:

   • It is said that... 据说……
   • The... was invented by... ……是由……发明的。
   • ...was invented in... ……是在……年被发明的。
   • ...was invented for the purpose of... ……是为了……的目的而被发明的。

2. 描述意外发现:

   • One day, ... happened by accident. 一天，……意外地发生了。
   • While..., ... discovered... 当……时，……发现了……。

3. 表达影响和感受:

   • It has had a great influence on our daily life. 它对我们的日常生活产生了巨大的影响。
   • Without doubt, it is one of the most important inventions. 毫无疑问,它是最重要的发明之一。
   • It makes our life easier/more convenient. 它让我们的生活更方便。

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单元主题范文翻译

Topic: The Invention of the Potato Chip (薯片的发明)

Potato chips, a favorite snack for people all over the world, were invented by accident. It is said that they were first created in 1853 by a cook named George Crum.

At that time, a customer at the restaurant where Crum worked complained that his fried potatoes were too thick. Crum was annoyed, so he decided to play a trick on the customer. He cut the potatoes paper-thin, fried them until they were very crispy, and covered them with a lot of salt. He thought the customer would hate them.

However, to Crum's surprise, the customer loved them! The crispy, salty potatoes were a big hit. Soon, other customers began to order the "Saratoga Chips," as they were called. And so, one of the world's most popular snacks was born by accident.

中文翻译：

薯片，这个全世界人们都喜爱的零食，是意外发明的，据说，它最早是由一位名叫乔治·克鲁姆的厨师在1853年创造的。

当时，在克鲁姆工作的餐厅里，一位顾客抱怨他炸的土豆太厚了，克鲁姆很恼火，于是决定捉弄一下这位顾客，他把土豆切得像纸一样薄，炸得非常脆，然后撒上了大量的盐,他认为顾客会讨厌它们。

令克鲁姆惊讶的是，顾客非常喜欢这些土豆！这些又脆又咸的土豆大受欢迎，很快，其他顾客也开始点这道被称为“萨拉托加薯片”的菜，就这样,世界上最受欢迎的零食之一就这样意外地诞生了。

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常见练习题及翻译

单项选择

• 题目: By the time I got home, my mother __ dinner. A. has cooked B. cooked C. had cooked D. was cooking

• 翻译: 当我到家时,我妈妈已经做好了晚饭。

• 答案: C

• 解析: “到家”(got home) 是过去动作，“做好晚饭”(cooked dinner) 是在“到家”之前完成的，所以用过去完成时 had cooked。

句子翻译

• 题目: 将下面的句子翻译成英文。

  1. 我到学校时,第一节课已经开始了。
  2. 据说,电话是贝尔发明的。
  3. 在他成为医生之前,他学了很多年医。

• 答案:

  1. By the time I got to school, the first class had already started.
  2. It is said that the telephone was invented by Bell.
  3. He had studied medicine for many years before he became a doctor.

希望这份详细的翻译和讲解能帮助你更好地掌握九年级英语第九单元的内容！