(一)句式的构成： A + is / are+ 形容词级+ than + B
A 是主格 B 是宾格
如： She is taller than me.
主格 形容词级 宾格
【例】 原级 级 高级
great greater greatest
small smaller smallest
clean cleaner cleanest
【例】 fine finer finest
nice nicer nicest
wide wider widest
【例】 big bigger biggest
hot hotter hottest
red redder reddest
【例】 clever cleverer cleverest
narrow narrower narrowest
able abler ablest
easy easier easiest
【例】 careful more careful most careful
difficult more difficult most difficult
delicious more delicious most delicious
原级 级 高级
good/well better best
bad worse worst
many/much more most
little less least
far farther/further farthest/furthest
注：有些形容词等级。如： right, wrong, woolen等。
【例】 Li Ping is older than Wang Hai. 李平比王海年纪大。
There are more students in Class One than in Class Two.一班比二班学生多。
1、 原级（同级）：as…as…; not as(so)…as…
We’ll give you as much help as we can.
She isn’t as(so)active in sports as before.
2. 级：表示两者之间比…… 更……可用状语much, a little, even等修饰： He made fewer mistakes than I did.
He is even richer than I.
3、 高级：形容词高级前加the, 副词高级前常省略the，后面多用of……， in……短语表示范围：
It was the most/least interesting story I have ever listened.
He is the tallest of the three.
4、 在两者之间表示“最……”时要在级前加the，而且还用of the two, of the pair短语：
John is the clever of the two boys.
Of the two boys, John is the clever.
You’re a boy as good as Tom.=You’re as good a boy as Tom.
2、 (1)too…to与 so…that sb.can’t…的句型转换：前者为简单句，主语，而后者为复合句，主语有两个，试：
The man was too angry to be able to speak.
The man was so angry that he wasn’t able to speak.
The milk was too hot to drink.
The milk was so hot that we can’t drink it.
(2) too…to…与 not enough to句型的转换：
He is too young to get married.=He is not old enough to get married.
The book is too difficult for me to read.=
The book is not easy enough for me to read.
约翰不象迈克那么苯。John is not so stupid as Mike.
John is less stupid than Mike.
John is cleverer than Mike.
John is taller than any other boy in the class.
John is the tallest boy in the class.
John is taller than :any other boy.
any of the other boy.
all the other boy.
any of the others.
any one else.
5、 the more….. the more….表示“越……越……”:
The more books you read, the wider your knowledge is.
The more food you eat, the fatter you are.
6、 more and more….表示“越来……越……”:
More and more students realized the importance of a foreign language.
Our country is getting stronger and stronger.