《词语句篇学习法》的语言知识学习过程是从词汇到语块，从语块到句子，再到篇章，是bottom-up模式；《词语句篇学习法》的运用能力解题思路是从篇章到句子，从句子到语块，再到词汇，是top-down模式。
本头条语言知识的讲解也是从上到下的top-down模式 ，以便学习者能形成整体的思路，系统检测、查漏补缺环节持续进行中，敬请关注！
《新概念英语》Pre-Unit Test 1 Ex.H
一、看例句明考点 Look at this example:
It is warm today, but it was warmer yesterday.
二、语言知识归纳：形容词比较级的构成与用法，比较级是比较等级语言点的下属分枝。
（一）比较等级的概念
1. 形容词和副词的比较等级分为原级、比较级和最高级三种。
2. 只描绘性形容词和副词才有比较等级。
3. 形容词和副词比较级和最高级的的构成分为两种情况：
1）多数双音节和所有多音节形容词或副词加more -, most -；
2）单音节及少数以-er, -ow, -y结尾的双音节形容词或副词 加-(e)r, -(e)st。
（二）比较等级的构成
1．形容词和副词的原级就是它们的原形，除它们的一般用法外，还用于as…as, (not) as / so…as句型，如：
This building looks not as / so high as that one. (so…as只用于否定句)
Mr Sun speaks English as fluently as you. (as…as既能用于肯定句，又能用于否定句)
2. 加more, most构成比较级或最高级的形容词和副词词根无变化；如：
sudden-more sudden-most sudden, difficult-more difficult-most difficult,…
3. 加-(e)r, -(e)st构成比较级或最高级的形容词和副词的词根变化规则如下：
4. 少数形容词和副词的比较级或最高级的不规则形式：
（三）比较级的用法：比较范围和比较结构
三、仿例句完成句子： Do these in the same way：
1. It is cool today, but it was ___________ yesterday.
2. It is wet today, but it was ___________ yesterday.
3. He’s late again today, but he was ___________ yesterday.
4. This test is easy, but that one is ____________.
5. This book is expensive, but that one is ______________.
6. This bookcase is large, but that one is _______________.
7. That film was interesting, but the other one was ____________.
8. Betty is pretty, but Jane is _____________.
9. Miss Green is beautiful, but Miss White is ______________.
10. Tom is intelligent, but Bill is _______________.
四、参考答案：
1. cooler 2. wetter 3. later 4. easier 5. more expensive 6. larger 7. more interesting 8. prettier 9. more beautiful 10. more intelligent
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