仁爱英语九年级上册知识点归纳九年级仁爱版Unit2Unit4知识点U2 Topic 2 I. 重点词组1. as a result 结果2. here and there 到处3. in the beginning 一开始4. in danger 处于危险中5. cut down 砍倒6. change sth. into sth. 把变成7. prevent from 防止8. greenhouse effect 温室效应9. refer to 提到10.deal with 处理11.take up 占据12.cut off 中断II. 重点句型1. As we know, none of us likes pollution. 众所周知，没有人喜欢污染。none与no one 的区别：a)none “全无”，既可指人也可指物，后常跟of 的短语; 作主语时，谓语动词既可用单数也可用复数；no one只指人，后不能跟of 的短语; 作主语时，谓语动词只用作单数。如：He has read no
