形容詞和副詞的比較級：
一.大多數形容詞和副詞有三個等級：
原級，比較級和最高級，比較級用於兩者（人或事物）的比較，表示「更…」用於說明「前者比後者更…」
二．形容詞和副詞的比較級和最高級的構成：
(1).規則變化 1. 單音節和少數雙音節的一般情況，在詞尾加-er/est。
new---newer -newesr
2.以字母e 結尾的詞在詞尾加-r/st.
nice---nicer---nicest
late---later---latest
3.重讀閉音節詞尾只有一個輔音字母且該輔音字母前只有一個元音字母。應雙寫該輔音字母，在加er/est.
hot--hotter--hottest fat--fatter---fattest
thin--thinner---thinnest red--redder--reddest
big--bigger--biggest
4.以輔音字母+y結尾的雙音節詞先變y為i在加er/est
early--earlier--earliest
happy--happier--happiest
easy--easier--easiest
busy--busier--busiest
healthy-healthier-healthiest
hungry-hungrier--hungriest
ugly--uglier--ugliest
5.多音節詞和部分雙音節詞的比較級和最高級前加more/most
careful--more careful--most careful
useful--more useful---most useful
carefully--more carefully--most carefully
loudly--more loudly---most loudly
delicious finely lightly quickly slowly easily interesting popular
(2).不規則變化：
good/well--better--best
bad/badly/ill--worse--worst
many/much--more--most
little--less--least
far-- farther--- farthest
further--- furthest
further一般做定語「較遠的，更進一步的」
old--- older--- oldest
elder--- eldest
elder做定語 my elder brother
①I jumped farther than you.
②It's not safe to go any further.
③We must get further information.
④I am two years older than you.
⑤Li lei is older than me.
三。形容詞和副詞的比較級的用法：
1.用於兩者（人或事物）之間的比較，表示「其中一個比另一個更…；較…」，後面用連詞than 引出比較的對象，即「比較級+than …」結構，當than 前後所使用的動詞相同時，通常用助動詞代替後面的動詞，該動詞或助動詞可以省略。
①This room is bigger than that one.
②I am taller than she (is).
或者接her
③She is younger than I am
或者 me
④His English is better than his brother’s
⑤He is more popular than Jim in the school.
⑥I like swimming better than Bill (does).
⑦Jane cooked more carefully than Maria(did)
⑧She draws better than Lily(draws/did)
⑨Tom runs faster than Lily.
2.「A+系動詞+the+比較級+of+the two（+複數名詞）」意為「A是兩者中比較…的」
①Ann is the more outgoing of the two (girls)
②Look at the two boys.My brother is the taller of the two.
③Bob is the taller of the two boys.
④Joy is the older of the two students.
3.表示「越來越…」可以用「比較級+and+比較級」結構
表示「越 …就越…」可以用「The+比較級…，the+比較級…」
①Our city is becoming more and more beautiful.
②The more you eat, the fatter you are .
③The weather is getting hotter and hotter.
④The more you smile, the happier you will feel.
⑤The harder you study,the better you will learn.
4.用比較級結構表示最高級含義
「than + any other +單數名詞
the +other +複數名詞
the others
用比較級的結構表示最高級的含義時，要看比較範圍是否包括被比較對象本身，如果包括，則須把本身排除。
①Tom is taller than any other student in our class。
=Tom is the tallest in our class.
5.Which/Who/What+系動詞+比較級，A or B?
表示兩個人或事物作對比，並進行選擇時，常用的句式。
①Who is better at English,Bob or Mike?
①What subject do you like better ,English or math?
6.有些詞位於比較級前，用來進一步說明比較的程度。這類的詞有much/a lot /far「…得多」 a little/a bit 「稍微更…一些」even「甚至更，還」等
①My friend Bill is much smarter than me.
②Our room is much bigger than theirs.
③I feel a lot better now.
④He is a little shorter than me.
Michael sings much more beautifully than Kangkang.
7. 兩者比較
(1).A =B A+B/V +as+形容詞/副詞+as +B
=the same +n+as …
①Jenny draws as well as Danny.
②My father is as tall as my mother .
③She is the same age as you
④She does her homework as carefully as his brother.
(2).A<B翻譯成A不如B 通常用not as/so+形容詞原形+as
=less +形容詞/副詞原形+than .
①This book is not so/as interesting as that.
=That book is more interesting than this book.
②Your school is less beautiful than ours.
=Our school is more beautiful than yours.
(3).A>B A強於B形容詞/副詞比較級+than.
She is taller than I(me).
(4).在同級比較結構中第一個as 前可加half,twice ,three times,等詞修飾表示倍數關係。
(5)表示不及另一方時，用less+原級+than…(雙音節he多音節詞 )