谁能解释一下“让步状语从句”和“比较状语从句”?

让步状语从句
要点:表示让步的状语从句由连词 though,although引导.
难点：
lthough,although当虽然讲,都不能和but连用.Although,(though)…but的格式是不对的.但是他们都可以同yet (still) 连用.所以thought (although)…yet(still)的格式是正确的.
lWrong:Although he is rich but he is not happy.
Right :Although he is rich,yet he is not happy.
虽然他很富有,然而他并不快乐.
lRight :Although we have grown up,our parents treat us as children.
Right :Although we have grown up,our parents still treat us as children.
尽管我们已经长大了,可是我们的父母仍把我们看作小孩.
although,though 辨析
although 不能though 那样用作副词,放在句末表示强调时要用even though.
lHe is looking fit,though.
但是,他看上去很健康.考点
lEven though I didn’t under a word,I kept smiling.
尽管我一个字也不懂,我还是一直微笑着.
lHe is quite experienced,he is young,though.
尽管他很年轻,他很有经验.
比较状语从句
要点：比较状语从句主要运用于形容词和副词的原级,比较级及*的句子之中.
原级
1.as…as 和.一样
Jack is as tall as Bob.
捷克和汤姆一样高.
2.not so(as)…as …和不一样
She is not so(as)outgoing as her sister.
她不如她姐姐外向.
比较级
more…than (更)
This book is more instructive than that one.
这本书比那本书由教育意义.
*
1.The most…in/of
This book is the most interesting of the three.
这本书是三本中最有趣的.
2.the + 形容词+est…of/in
This road is the busiest street in our city.
这条路是我们城市最繁忙的街道.
知识扩展
lno more than只不过(嫌少的意思)
I have no more than two pens.
我只有两支笔.
It’s no more than a mile to the shops.
去商店不过一英里.
lnot more than不如.；(前者不如后者)
Jack is not more diligent than John.
捷克不如约翰勤奋.
lone of the + 名词(复数)….之一(用于*)
Han Mei is one of the best students in our school.
韩梅是我们学校最好的学生之一.