九年级英语Unit6-知识点总结(共3页).doc

精选优质文档-倾情为你奉上九年级英语Unit6When was it invented ?知识点1. invent v. 发明 inventor n. 发明家 invention n. 发明，可数名词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（犯错是：make mistake，这些常见的短语大家务必要掌握） I took the