1) 直接说明事物的性质或特征的形容词是性质形容词，它有级的变化，可以用程度副词修饰，在句中可作定语、表语和补语。例如：hot 热的。
2) 叙述形容词只能作表语，所以又称为表语形容词。这类形容词没有级的变化，也不可用程度副词修饰。大多数以a开头的形容词都属于这一类。例如：afraid 害怕的。
(错) He is an ill man. (对) The man is ill.
(错) She is an afraid girl. (对) The girl is afraid.
1) 某些形容词加上定冠词可以泛指一类人，与谓语动词的复数连接。如：the dead，the living，the rich，the poor，the blind，the hungry
The poor are losing hope.
the British，the English，the French，the Chinese.
The English have wonderful sense of humor.
1) 大部分形容词加-ly可构成副词。但 friendly，deadly，lovely，lonely，likely，lively， ugly，brotherly，仍为形容词。
改错：(错) She sang lovely. (错) He spoke to me very friendly.
(对) Her singing was lovely. (对) He spoke to me in a very friendly way.
The Times is a daily paper. The Times is published daily.
a small round table a tall gray building
a dirty old brown shirt a famous German medical school
an expensive Japanese sports car
1. worth：be worth + n. 当名词为金钱时，表示"…… 值得……"
be worth doing sth. "……某事值得被做"
The question is not worth discussing again and again.
2. worthy：be worthy of +n. 当名词为抽象名词时表示"……值得……"
be worthy to be done "某事值得被做"
The question is not worthy to be discussed againand again.
3. worth-while：be worth-while to do sth "值得做某事"
worth while：It is worth while doing sth
It is worth while sb to do sth.
It is not ____ to discuss the question again and again.
A.worth B.worthy C.worth-while D.worth while
答案C. 由worth的用法可知，此句只适合词组be worth-while to do sth.。副词及其基本用法
We could see very clearly a strange light ahead of us.
He speaks English well.
Please write slowly and carefully.
改错：(错) I very like English. (对) I like English very much.
I don't know him well enough.
There is enough food for everyone to eat.
There is food enough for everyone to eat
close意思是"近"; closely 意思是"仔细地"
He is sitting close to me. Watch him closely.
2) late 与lately
late意思是"晚"; lately 意思是"最近"
You have come too late. What have you been doing lately?
He pushed the stick deep into the mud.
Even father was deeply moved by the film.
The plane was flying high. I think highly of your opinion.
He opened the door wide. English is widely used in the world.
You can eat free in my restaurant whenever you like.
You may speak freely; say what you like.
① 表示被比较双方在某一方面相等或相同时, 用as + adj / adv + as结构, 表示“…和…一样” 。如：
a. Xiao Li is as tall as his sister.
b. It is as cold today as it was yesterday.
c. There are as many seats in this hall as in that hall.
② 表示被比较双方在某一方面不相等或不同时, 用not as / so + adj / adv + as, 表示“…和…不一样”
a. Xiao Li is not as / so tall as his brother.
b. It is not so / as cold today as yesterday.
c. There are not so / as many seats in this hall as in that hall.
① 对方比较，表示一方超过另一方时，用“比较级 + than”的结构表示。如： This picture is more beautiful than that one.
② 表示一方不及另一方时，用“less + 原级 + than”的结构表示。
如： This room is less beautiful than that one.
③ 表示一方超过另一方的程度或数量时，可在比较级前加表示程度的状语，如even、a lot、a bit、a little、still、much、far、yet、by fay等修饰。如： He works even harder than before.
She is better than she was yesterday. Please come earlier tomorrow.
He is taller by far than his brother.
He is by far the taller of the two brothers.
④ 表示一方随另一方的程度而变化时，用“the + 比较级(主语 + 谓语)，the + 比较级(主语 + 谓语)”的结构(意为“越……越……”)。如：
The harder he works, the happier he feels.
⑤ 不与其他事物相比，表示本身程度的改变时，用“比较级 + and + 比较级”的结构。如：
The weather is getting colder and colder.
The girl becomes more and more beautiful.
He is superior to Mr. Zhang in chemistry.
The book on the table is more interesting than that(或the one)on the desk.
A box made of steel is stronger than one made of wood.
(A)A is three(four, etc.)times the size(height, length etc.)of B.
如：The new building is four times the size(the height)of the old one.
(B)A is three(four, etc.)times as big(high, long, etc.)as B.
如：Asia is four times as large as Europe.
(C)A is three (four, etc.)times bigger(higher, longer, etc.)than B.
如：Your school is three times bigger than ours.
①三者或三者以上相比，表示最高程度时，用“the + 最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。如：
Zhang Hua is the tallest of the three.
He works(the)hardest in his class.
②最高级可被序数词以及much、by far、nearly、almost 、by no means、not quite、not really、nothing like等词语所修饰。如：
This hat is by far / much / nearly / almost / not nearly / by no means / not quite / nothing like the biggest.
How much did the second most expensive hat cost?
He is the tallest(boy)in his class.
Of all the boys he came(the)earliest.
as + 形容词或副词原级 + as
He cannot run so/as fast as you.
2)当as… as 中间有名词时采用以下格式。
as +形容词+ a +单数名词
as + many/much +名词
This is as good an example as the other is.
I can carry as much paper as you can..
This room is twice as big as that one.
Your room is the same size as mine.
4) 倍数+ as + adj. + as <=> 倍数+ then + of
This bridge is three times as long as that one.
This bridge is three times the length of that one.
Your room is twice as large as mine.
Your room is twice the size of mine.
the + 最高级 + 比较范围
1) The Sahara is the biggest desert in the world.
It is a most important problem. =It is a very important problem.
(错)Tom is the tallest of his three brothers.
(对)Tom is the tallest of the three brothers.
2) 下列词可修饰最高级，by far, far, much, mostly, almost
This hat is nearly/almost the biggest.
注意： a. very可修饰最高级，但位置与much不同。
This is the very best.
This is much the best.
Africa is the second largest continent.
Mike is the most intelligent in his class.
Mike is more intelligent than any other students in his class.
4) "否定词语+比较级"，"否定词语+ so… as"结构表示最高级含义。
Nothing is so easy as this.=Nothing is easier than this.
=This is the easiest thing.
比较级形容词或副词 + than
You are taller than I.
They lights in your room are as bright as those in mine.
(错) He is more cleverer than his brother.
(对) He is more clever than his brother. (对) He is clever than his brother.
(错) China is larger that any country in Asia.
(对) China is larger than any other countries in Asia.
The population of Shanghai is larger than that of Beijing.
It is easier to make a plan than to carry it out.
比较：Which is large, Canada or Australia?
Which is the larger country, Canada or Australia?
She is taller than her two sisters.
She is the taller of the two sisters.
1)a bit, a little, rather, much, far, by far, many, a lot, lots, a great deal, any, still, even等
1) the more… the more… 越……就越……
The harder you work，the greater progress you'll make.
2) more B than A 与其说A不如说B
less A than B
He is more lazy than slow at his work.= He is less slow than lazy at his work.
3) no more… than… 与……一样……，不比……多
The officials could see no more than the Emperor.
no less… than… 与……一样……
He is no less diligent than you.
4) more than 不只是，非常
She is more than kind to us all.
many, old 和 far
1) 如果后接名词时， much more +不可数名词
many more +可数名词复数
2) old 有两种比较级和最高级形式: older/oldest 和elder/eldest。 elder，eldest 只用于兄弟姐妹的长幼关系。
My elder brother is an engineer.
Mary is the eldest of the three sisters.
3) far 有两种比较级，farther，further. 在英语中两者都可指距离。
I have nothing further to say.