Despite other explanations， the real answer in my opinion lies partly(程度副词)in the child himself， partly(程度副词) in the behavior of the people around him. In the first place， the time of learning the mother tongue is the most (程度副词)favorable of all， namely， the first years of life. A child hears it spoken from morning till night and， what is more (程度副词)important， always (频度副词)in its genuine form， with the right pronunciation， right intonation， right use of words and right structure. He drinks in all the words and expressions， which come to him in a flash， ever-bubbling spring. There is no resistance： there is perfect assimilation.
形容词/副词的比较级结构和最高级结构：
比较级：more important/ more frequently
最高级：most favorable/ most economically
同级比较：as..as../the same..as.. /not so...as
e.g. This apple is as big as that one.
e.g. They work as hard as ever.
e.g. I study at the same school as she (does).
e.g. The idea is not so silly(愚蠢的) as it sounds.
比较级：more..(than)..
e.g. He always thinks that he is more important than we (are).
e.g. This kind of accident happens more frequently than that kind (does).
提示：than是起比较作用的连词，其后面的省略结构中出现代词的时候要注意根据比较对象来确定是主格还是宾格，以及所省略的助动词的形式。
比较：
e.g. I know you better than he. 我比他更了解你。
e.g. I know you better than him. 同他相比较， 我更了解你。
最高级：
e.g. a most carefully prepared report
e.g. a most important city