比較結(jié)構(gòu)是常用結(jié)構(gòu)，正確地使用這一結(jié)構(gòu)可以使文章句式變化，提高寫作水平。下面是比較結(jié)構(gòu)一些常用表達(dá)方法。
1）同級(jí)比較
In 1998 we produced as many cars as we did in the previous five years.
We have accomplished as much in the past three years as would have taken ten years in the past.

2）比較級(jí)
Children now enjoy better medical treatment than before.

3）最高級(jí)
This is the most interesting book I've ever read.

4）the more…，the more…結(jié)構(gòu)
The harder you work, the greater progress you will make.

5）選擇比較
I prefer staying at home to going out.
He prefers to work alone.
They prefer to work rather than (to) sit idly.

6)對(duì)比
Motion is absolute while stagnation is relative.
He is tired out, whereas she is full of vigour.
注意：while 和whereas均可用于連接兩個(gè)意義對(duì)立分句，相當(dāng)于漢語“而”字。