常用形容词比较级结构小结
1.当as… as 中有名词时
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..
2.  倍数+ as + adj. + as= 倍数+ the+ of,表示倍数的词或其他程度副词做修饰语时放在as前
This room is twice as big as that one. (Your room is the same size as mine.) 
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.) 
3.可修饰比较级的词 a bit, a little, much,  a lot,  still, even，far等
4.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 只用于兄弟妹的长幼关系。My elder brother is an engineer.
3) far 有两种比较级，farther，further. 在英语中两者都可指距离。在美语中，father 表示距离，further表示进一步。I have nothing further to say. 
5.the + 最高级 + 比较范围 
The Sahara is the biggest desert in the world.
形容词最高级前通常必须用定冠词 the，副词最高级前可不用。
形容词most前面没有the，不表示最高级的含义，只表示"非常"。
It is a most important problem.  =It is a very important problem.
6．“the ＋ 形容词”的两种用法
“the＋形容词”既可以等同于复数普通名词，也可以等同于抽象名词，代表一类人或事。
The rich are apt to look down upon the poor.富人常常轻视穷人。
The poet had an yearning for the supernatural.诗人憧憬超自然的东西。
这种用法也可以适用于“the＋现在分词”及“the＋过去分词”。
The unexpected always happens. 天有不测风云。
The wounded and the dying were rushed to hospital. 受伤的人和垂死的人被急送到医院去了。
7. “the＋ 比较级＋理由”
该句型具有“更加”的意思。常以“all (或much) the＋ 比较级”的形式出现。例如：
I am the more inclined to help him because he is poor. 因为他穷，我更想帮他。
It is all the more dangerous for not being generally recognized as such.
一般不认为危险的，反而更加危险。
8.“the＋比较级...，the＋比较级...”。该句型的意思为“越……越……”。例如：
The more he flatters me,the less I like him.他越是迎合我，我越不喜欢他。
The higher the mountain is, the more people like to climb it; the more dangerous the mountain is, the more they wish to conquer it.山越高，人越想爬；山越危险，人越想征服它。
这种句型常用省略说法，The sooner,the better.越快越好。 More haste,less speed. 欲速则不达。
9.“the last＋不定式/形容词从句”。意思是“最不大可能的、最不适的”。
noise的形容词Money is the last thing he wants, and you won’t succeed by offering it.
他决不要钱，你想用钱去买动他是决不可能的。
The author should be the last person to talk about his work.作者最不宜讨论他的作品。
10.序数词通常只修饰最高级。 Africa is the second largest continent.
11.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. 
12.. more词组 
1) the more… the more… 越……就越……
  The harder you work，the greater progress you’ll make.
2) no more… than…不比……多/ no less… than…  不如 ……
The officials could see no more than the Emperor.
He is no less diligent than you.
3) more than不只是，非常 She is more than kind to us all.
13.“so＋形容词/副词＋that”
在“so”后接形容词和副词表示因果关系，“that”之前表示原因，“that”之后表示结果。例如：
Those ponds and streams are so small that they cannot be shown in your maps.
那些池塘和小溪太小，所以你的地图上没有。
He had lived so long in Asia that he had forgotten his English way of life.
他在亚洲住得太久，所以英国的生活习惯都已经忘记了。
14. “so much so that” 理解为“如此……以至于”
The patient was very tired when he returned from the ride, so much so that he could not sit up.
病人坐车回家时非常疲倦，疲倦得甚至不能坐起来。
He is poor, so much so that he can hardly get enough to live.他很穷，穷得几乎难以生活
下去。
15．“more＋原级＋than”
这种句型一般将不同性质加以比较，可以理解为“与其说……不如说”。例如：
He is more witty than wise.与其说他聪明，不如说他机智。
He is more dead than alive. 与其说他活着，不如说他死了。
16．“much more”和“much less”
以上两种表达法都有“更加”的意思。“much more”用于肯定句，表示程度加强；“much less”用于否定句，表示程度减少。例如：
I like music, much more dancing.我喜欢音乐，更喜欢跳舞。
I don't like music, much less dancing.我不喜欢音乐，更不喜欢跳舞。
17.．“would sooner(rather)...than”和“ would as” 均可理解为“宁愿……也不”。
He would rather(sooner) resign than take part in such dishonest business deals.
他宁可辞职也不干这种不正当的勾当。
I would as soon die as disgrace myself.我宁死不受辱。
18．“han”、“when”和“ before”
以上三个句型的意思是“一……就”。应当注意的是，在以上句型中，句子的前半部分一般用过去完成时，而后半部则用一般过去时。该句型通常采用倒装语序。
No sooner had I opened the cage than the little bird flew out.=Scarcely(Hardly) had I opened the cage before (when ) the little bird flew out.我一开笼小鸟就飞出去了。
19．“anything but”、“nothing but”和 “all but”
英语中，“anything but”=never,“ nothing but”=only, “all but”=almost, nearly。
He is anything but a scientist.他决不是科学家。
I am nothing but a student.我不过是个学生。
He is all but a fool.他几乎是个傻瓜。