Unit 3 I’m more outgoing than my sister
1.一般在原级后加er 构成比较级，加est构成最高级。 small smaller smallest young younger youngest
2.以不发音的字母e 结尾的形容词，直接加r 或st 构成比较级和最高级。 nice nicer nicest late later latest
3.以辅音字母+y 结尾的形容词，变y为i ，再加er 或est, 构成比较级和最高级。 busy busier busiest heavy heavier heaviest
4.在重读闭音节中，末尾只有一个辅音字母的形容词，要先双写这个辅音字母，再加er或est， 构成比较级和最高级。 hot hotter hottest big bigger biggest
5.以er，ow结尾的双音节词加er 或est: clever slow
good (well) better best bad (badly, ill) worse worst many(much) more most little less least
far father farthest 或 further furthest
1.以ly 结尾的副词，除early 变为 earlier 和 earliest 外， 其余一律在其前加more 和most。
如：carefully – more carefully – most carefully
2.规则变化直接加er 和 est 。 如：fast – faster—fastest
well – better – best far – farther – fastest badly – worse – worst
4.句子中，副词最高级前的the 可省略也可以不省略，但形容词最高级前面的the 绝对不能去掉。
Who runs (the) fastest, Tom, Jim or Mike?
形容词各等级的用法： 1.原级（同级）比较：as…as…; not as(so)…as…
He’s as tall as I（me）. She’s not as beautiful as I（me）
比较级： A + be + 比较级 + than + B. 可用much, a little, even， a lot, a bit, far，still用于比较级前说明比较级的程度： He is younger than I (am).他比我年轻。
The weather here is hotter than that in Guangzhou.这里的气候比广州的热.
He is much taller than me. 他比我高得多。
表示"较...低; 不及..."用less+原级形容词+than+比较成分。I am less young than he (is).我不比他年轻。
如果在两者之间表示―最……‖时要在比较级前加the，而且还用of the two, of the pair短语：
the+比较级+ of the two译为―两个中比较……的‖。
John is the clever of the two boys. This watch is the cheaper of the two.这支手表是两个中比较便宜的。
约翰不象迈克那么笨：John is not so stupid as Mike. =John is less stupid than Mike. =John is cleverer than Mike.
最高级：形容词最高级前必须加the, 副词最高级前常省略the，后面多用of……， in……短语表示范围：
He’s the tallest in our class. He is the tallest of the three.
John is the tallest boy in his class.
=John is taller than any other boy in his class.
=John is taller than the other students in his class. =John is taller than all the other students in his class.
=John is taller than anyone else in his class.
China is larger than any country in Africa.中国比非洲的任何一个国家都大。
This watch is more expensive than any other watch in the shop.在这个店里，这只表比其他任何一个别的表都贵。 比较级+and+比较级译为―越来越……‖
The earth is getting warmer and warmer.地球变得越来越暖和。 China is more and more beautiful.中国变得越来越美丽 注意：多音节形容词用此句型时，要用more and more +形容词原级；而不能用more beautiful and more beautiful.
more and more….表示―越来……越……‖: More and more students realized the importance of a foreign language.
(错)He is more cleverer than his brother. (对)He is more clever than his brother. (对)He is clever than his brother.
两者比较时，必须是同类的， 否则要用that, those, one等替带结构来进行比较。
2) 3) A TV set made in Shanghai is better than one made in any other city.
too…to与 so…that sb.can’t…的句型转换：前者为简单句，主语只有一个，而后者为复合句，主语有两个，试比较： 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.
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.