:九年级英语上册六单元重要知识点总结：When was it invented?
九年级英语上册六单元重要知识点总结：When was it invented?
Unit6 When was it invented?
【重点短语】
1. by accident 偶然地;意外地
2. without doubt 毫无疑问的;的确
3. by mistake 错误地
4. look up to 钦佩;仰慕
5. take place 发生;出现
6. all of a sudden 突然;猛地
7. divide…into… 把……分成......
8. the Olympics 奥林匹克运动会
9. the style of ……的样式
10. be used for 被用于……
【考点详解】
1. invent v. 发明
inventor n. 发明家
invention n. 发明
2. be used for doing 用来做…(是被动语态)(这个短语的考点有两点，一是used for的意思，二是for后面用动名词)
Pens are used for writing. 笔是用来写的。
3. 给某人某样东西 give sth. to sb.
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。
4. all day 整天
5. salty adj. 咸的 salt n. 盐
6. by mistake 错误地(犯错：make mistake，这些常见的短语大家务必要掌握)
I took the umbrella by mistake. 我不
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