【自主学习】
【课内探究】
【自主学习】Grammar 形容词和副词的比较级
回顾倍数表达的三种主要句型：
这条河流是那条河流的两倍长。
1. This river is twice as long as that one .
2. This river is twice longer than that one .
3. This river is twice the length of that one .
判断正误并改正：
1. This building is two times the length of that one . ( )
2. This building is 3 times as bigger as that one . ( )
3. This river is 3 times long than that one. ( )
翻译：
这个房间是那个房间的3倍大。（用三种形式表达）
1. _______________________________________
2. ________________________________________
3. _______________________________________
二．形容词和副词的比较等级的基本用法
