| 1.副词比较级和最高级的构成规则有两种:两个和两个音节以上的副词都是在原级前加more和most,只有少数单音节词和个别双音节词在词尾加 
            -er和 -est,如: fast    faster      fastest
 early    earlier     earliest
 brightly  more brightly  most brightly
   有少数不规则形式,如:well   better       best
 badly   worse       worst
 much   more        most
 little  less        least
 late   later       last
 far   farther/further  farthest/furthest
   2.副词有三个比较等级。a.原级常用“as +原级+ as”结构,否定形式为“not as(so) … as”。在 as(so) … as 结构前可用just, 
              almost, half, nearly等词表示程度。 as从句后可省略可省的词。如:
 He doesn't smoke half as (so) heavily 
              as his friends.
    b.比较级常用“比较级+than”结构,否定形式用“not as(so) … as … ”或用“less … than 
              … ”结构。比较级前可用much, a little, a great(good) deal , any, no, even, 
              still, yet或者“数词+名词”构成的名词短语等来修饰。比较级也可单独使用。如:I came three hours earlier than 
              others.
 No sooner had he left the house 
              than it began to rain.
    c.比较级“the more … the more”结构表示“越…就越”,“more and more … ”表示“越来越…”,如:The harder you study now, the 
              better you will work in the future.
 It rained more and more heavily.
    d.比较级用于否定结构可表示“最…不过”,如:I can't agree with you more.
    e.最高级常用“the+最高级+比较范围”结构,比较范围为介词短语或从句,有时定冠词可省略,如:They all came early but she came (the) 
              earliest of all.
 
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