Adj.        adv.
用以修饰名词，表示事物的特征的词。e.g.  long, empty, cheap, hungry, etc.

在句中作定语、表语、宾语补足语等成分．
e.g. He is a good student.
I have something important to tell you.
当形容词修饰由some-,any-,no-,every-
构成的不定代词时,形容词要放在这些
不定代词的之后. e.g.
Is there anything interesting in today’s newspaper ?
作定语
The trees turn green in spring.
We are alone on the island.
只能作表语，不能作定语的形容词
你能说出几个？
alone   afraid   awake  asleep  alive  able
作表语
形容词和宾语一起构成复合宾语．e.g.
We  must keep the classroom clean.
He  made us  happy.
作宾语补足语
Colour it green.
形容词的比较级和最高级构成
规则变化
不规则变化
1. 规则变化
taller
tallest
harder
hardest
larger
largest
wider
widest
bigger
biggest
hotter
hottest
happier
happiest
drier
driest
more difficult
most difficult
more popular
most popular
2、不规则变化
best
better
worse
worst
more
most
less
least
farther                     farthest

further                     furthest
older                        oldest
elder                        eldest
 可用much, still, a little, even, far,three years等表示程度的状语来修饰比较级
  *She is much taller than Mrs.Liu.
  *He is three years older than I.
  *This problem is a little more   difficult than the other one.
形容词原级的常用句型
Tom is as tall as Mike.?
as+形容词原形+as
There are as many students in our school as yours. ?
I don’t have as much money as you do.
第一个as后的形容词做定语修饰名词.将该名词及有关修饰语全列在第一个as后.
    否定   not as+形容词原形+as
               “和… 不一样”
     或      not so+形容词原形+as
               “不及／不如…   
Tom is not as tall as Mike.
Tom is not so tall as Mike.?
This truck is big enough to carry 5      tons.?
     so+ 形容词原级+that丛句
     such+名词＋that丛句
He is so big that he can’t enter the room by?the door .
   … too+原级+ to do sth.
He is too young to join the army.
  形容词原级+ enough to do sth. 
倍数词/half+as+形容词原形+as

  
 
Tom is  three times as old as Mike.
My school is  twice/half as large as
Yours.
   比较级+than…
形容词比较级的常用句型
This bridge is longer than that one.?
 Our school is larger than theirs.?
 倍数词+比较级+than…
 Our school is three times larger than theirs.?
He is three years older than I.
  
 
 more (less) than
She is more than thirty.     
The lightest box weighs less than 50 kilograms.

more or less
 The problem is more or less solved.
 这个问题差不多已经解决了。
 Is it straight? – More or less.
 它直吗？ – 差不多吧。

     
“The+比较级…，the+比较级…”           
“…比较级+and+比较级…”        
The smaller the house is, the less it will cost us the heat.?
In spring, the days are getting longer and longer.?
the+比较级+of

Jhon is the taller of the two.
表示两者之间的选择，可使用“Which is+ 比较级，…or…?”?
 表示不及另一方时，使用“less+原级+than…”
Which is longer, this one or that?
This park is less beautiful than that one.?
…one of the+最高级+名词复数
形容词最高级的常用句型
…最高级+of (in/among)…
This is/ was the最高级+名词+that定语从句
Lu Xun is one of the greatest writers last century.?
This is the worst film that I have seen these years.?
Of all the movie stars, I think Zhang Ziyi is the best.?