形容词和副词的原级比较级和最高级 （一）原级的构成和用法 1.构成 形容词、副词的原级即本身。 Beautiful 漂亮的 quickly 迅速地 2.用法 表示双方在程度、性质、特征等某方面相等时，用“as + 原级形容词/副词 + as”的结构； 表示双方不相等时，用“not so(as) + 原级形容词/副词 + as”的结构； 表示一方是另一方的若干倍时，用“倍数 + as + 原级形容词/副词 + as”的结构。 This room is three times as large as that one.     这个房间是那个的三倍大。 （二）比较级和最高级的构成和用法 1.构成规则  单音节词和少数双音节词一般在词尾加¬er, ¬est tall--taller--tallest/cheap-- cheaper--cheapest 以不发音的e结尾的单音节词只加¬r, ¬st nice--nicer--nicest/large-- larger--largest 以一个辅音字母结尾的重读闭音节词, 双写结尾的辅音字母, 再加¬er, -est big--bigger--biggest/thin-- thinner--thinnest 不知不觉背单词 英语单词速记 新概念英语青少版 以辅音字母加y结尾的双音节词, 变y为i, 再加¬er, ¬est busy--busier--busiest/angry--angrier--angriest 少数以¬er, ¬ow结尾的双音节词末尾加¬er, ¬est clever--cleverer--cleverest/narrow--narrower--narrowest 部分双音节词和多音节词, 在其前加more, most来构成比较级和最高级 important--more important--most important 2.用法 more＋原级/名词＋than＋原级/名词, 意为“与其说是……不如说是……” He is more diligent than clever. 与其说他聪明，不如说他勤奋。 “比较级＋and＋比较级”和“more and more＋多音节词原级”, 表示程度递增。这种结构后不可接than引导的从句。 Things are getting better and better.事情变得越来越好。 1．It is very important to know about t he cultural differences that         cause problems. A．must   B．dare   C．need   D．may 2．—Why didn't you tell him of the possible danger? —But what        otherwise？He never listens to me. A．could I do   B．could I have done C．should I do   D．must I have done 3．I'd rather the two countries        an end to the war. Then their people could live in peace. A．puts   B．would put C．put  D．should put 4．Without the help of the PLA men，all 69 miners trapped in a flooded coal mine in Henan Province for three days        . A．couldn't rescue B．couldn't have been rescued C．shouldn't have rescued D．hadn't been rescued 5．—What is a good boss like? —It's hard to say，but I think he        be responsible，determined an d creative. A．can   B．may   C．should   D．would 6．—Has your brother found a job? —Not yet. There are many jobs that he         do but he seems unwilling to do anything. A．shall   B．could   C．must   D．should 7．I actually believe that we         in Xi'an now if you hadn't been caught drunk driving last month. A．would be   B．would have been C．were   D．had been 8．—David is often absent from class. —Tell him he         answer for it if he goes on behaving like that. A．shall   B．will   C．would   D．can 9．—What happened to the young trees we planted last week? —The trees         well，but I didn't water them. A．might grow   B．needn't have grown C．would have grown   D．would grow  10．Luckily the man missed the high speed train to Wenzhou，or he         have been killed in the accident. A．must   B．would   C．should   D．might