副词在句中主要用作状语，修饰动词、形容词、副词、介词短语或句子。修饰动词，表示时间、地点、程度、方式、频度等。一般位于动词之后，如果动词有宾语，则要位于宾语之后。
副词的三种用法
1. 原级比较由“as+形容词或副词(或再加名词或短语)+as ”构成“原级相同”比较句，表示两者比较;其否定式，即“程度不及”比较句型为“notso(as) +形容词或副词+as”，而且as…as结构前可用just, almost, nearly, quite等表示程度的词修饰
1) Walking briskly for thirty minutes will burn as many calories as .
〔A〕 to run for fifteen minutes
〔B〕 running for fifteen minutes
〔C〕 you run for fifteen minutes
〔D〕 fifteen?minute walking
2) The gorilla(大猩猩)， while 〔A〕 not quite as curious than 〔B〕 thechimpanzee(黑猩猩)， shows more persistence 〔C〕 and mory retention(记忆力) in solving〔D〕 a probl.
3) Alaska is twice 〔A〕 as larger 〔B〕 as 〔C〕 the next largest 〔D〕 state，Texas.
2. “as(so)+名词+as+名词”进行名词比较，这时一般情况下有一个表示原级的比较词，但如果第一名词前出现了形容词修饰该词或出现副词修饰谓语，应当用so而不用as
4) Thomas Jefferson’s achievents as an architect rival his contributionsa politician.
〔A〕 such
〔B〕 more
〔C〕 as
〔D〕 than
5) I should say Henry is not much a writer as a reporter. (88年考题)
〔A〕 that
〔B〕 so
〔C〕 this
〔D〕 as
3. 表示“是……几倍”时用“twice; three times等 + as 形容副词as...” eg. 1)This book coststwice as much as that one. 这本书的价钱是那本书的两倍。
2)He has four times as many books as I have 他拥有的书是我拥有的四倍 1.比较级由“形容词(副词)比较级+than+…，”构成表示在两者中间一方比另一方“更加…”。连词than后可接句子，也可接名词、代词、名词短语、介词短语、动词、动词不定式、?ING结构和?ED结构，有时也可省去than。
6) Natural mica(云母) of 〔A〕 a superior 〔B〕 quality is cheapest 〔C〕 to obtainthan synthetic 〔D〕 mica.
7) She is older than .
〔A〕 any other girl in the group
〔B〕 any girl in the group
〔C〕 all girls in the group
〔D〕 you and me as well as the group
8) Josephine McCrackin joined 〔A〕 the “Santa Cruz Sentinel” in 1905 and，until her death fifteen years late 〔B〕 ， rained 〔C〕 active in journalistic 〔D〕work.
2. 注意than前后两项相比较的人或事物要一致
9) The purpose of the research had a more important meaning for th than.
〔A〕 ours
〔B〕 with us
〔C〕 for ours it had
〔D〕 it did for us
副词是什么意思
1、副词是指在句子中表示行为或状态特征的词，用以修饰动词、形容词、其他副词或全句，表示时间、地点、程度、方式等概念。副词可分为：时间副词、频率副词、地点副词、方式副词、程度副词、疑问副词、连接副词、关系副词、表顺序的副词。
2、英语副词的用法：
副词在句中可作状语，表语，补语，定语。
He works hard.（作状语）
他工作努力。
You speak English very well. （作状语）
你英语讲得相当好。
