英语形容词是表示人或事物的性质、状态,和特征的一类词，形容在句子中可以作定语、表语和宾语补语。
１）I can’t afford such an expensive car.（做定语）
２）It’s so expensive that I can’t afford it. （做表语）
３）She doesn’t find it so difficult to learn a foreign language.（做宾语补语）
英语副词是用来修饰动词、形容词、副词或整个句子，表示时间、地点、程度、方式等关系的一类词。
１）I hardly remember my grandmother but I remember my grandfather very well.(修饰动词remember)
２）How nice to see you again! Dad and I were terribly worried about you.(修饰形容词worried)
３）Sound travels much faster than an airplane but light travels even faster than sound. (修饰副词faster)
４）Intrestingly, Tea in China was drunk from cups without handles.(修饰句子)
形容词与副词在使用中有比较等级的变化，比较等级包括：原级、比较级与最高级。形容词与副词的原级不发生形态上的变化，比较级与最高级有形态变化，其变化形式有规则变化、不规则变化和多音节单词的变化。
1).规则变化
２）.不规则变化
形容词与副词在使用上首先要注意其比较等级的使用，表示两个或两方的比较要用比较及形式；表示三个或三方以上的比较要用最高级形式。比较等级可以用表比较的介词或连词than，也可以暗含在语境中而不用表比较的介词或连词than，介词as也可以表示比较，但as表示……一样，as表示的比较只能用原级。
形容词与副词在句子都可以起到修饰作用，形容词主要修饰句中的名词，作名词的定语；副词主要修饰句中的动词，形容词，副词或修饰整个句子作状语。有的词兼有形容词与副词两种词性，如：late, hard, fast等，有的词形式上像副词，但实际上是形容词，如：friendly, lovely, likely等。大多数形容词可以通过加ly转化成副词。
用所给词的适形式填空
1. I think she looks __________than in the photo. ( pretty)
2. She will be much __________ (happy) in her new house.
3. My room is twice __________than my sister's. ( large)
4. In summer it is much __________in Wuhan than in Beijing. (hot)
5. Of the two girls, I find Lucy the __________ (clever).
6. He paid no __________ (little) than 10,000 pounds for it.
7. As jobs are difficult to find, she decides to have __________ (far) study.
8. When you visit a __________ (total) different place the first time, the new food ,habits and language might make you want to run all the way back.
9. His __________ (old) daughter has just got married.
10. There is only one year between us but he looks much __________ (old) than me.
11. It always feels __________ (good) to lie on the grass in the sun on a cold winter.
12. He doesn’t look __________ (good). What’s wrong with him?
13. The twins look almost __________ (like) .
14. Many people fell __________ (sleep) during the dull speech.
15. He felt __________ (sleep) after a whole day’s hard work.
16. The mother walked into the room and found the children were still ________ (wake).
17. The __________ (high) the ground is, the __________ (thin) air becomes.
18. －Let’s go shopping at the new mall.
－Why not shop online? It’s__________(expensive).
19. My dog is very _______(friend). It is safe to touch him if you want to.
20. －What do you think of the film you saw yesterday?
－Oh! It’s one of the __________ (interest) films I’ve ever seen.
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