1. 表示A与B 在某一方面程度相同或不同时用形容词或副词的原级。

肯定句中的结构：“A… as 形容词/副词原级 as B”。

Tom is as tall as Jack.

He runs as fast as I.

否定句中的结构：“A… not …as/so 形容词/副词原级 as B”。

I don’t do my homework as (so) carefully as you.

She isn’t as (so) careful as you.

否定句的结构相当于less 形容词/副词原级 than。

This movie is less interesting than that one.

2. “A … 比较级 than B”。如：

This room is bigger than that one.

I am taller than you.

注意：有些词可以放在比较级之前表示程度，常见的有a lot ; much; a little; a bit; still; far...

more不能放在比较级之前，只能放在原级前，跟原级一起构成比较级。

3. 比较级 and 比较级，表示越来越... 如：

The weather is getting warmer and warmer.

Our country is becoming more and more beautiful.

4. the 比较级...，the 比较级..., 表示越.... 就越...

The more you eat, the fatter you will be. 你吃的越多，你就越胖

The more you study, the more you know. 你学习的越多，你知道的就越多。