长难句解析是考研英语斩获高分的基础，而状语从句又是考研英语长难句解析的关键环节，今天我们就来重点解析一下考研英语语法中的难点之一：比较状语从句。首先大家必须搞清楚状语从句，从本质上讲，状语从句就是用连词将几个分句连接起来，用来表达分句之间特定的逻辑关系。来看一个例句：【例句】George Annas, chair of the health law department at Boston University, maintains that, as long as a doctor prescribes a drug for a legitimate medical purpose, the doctor has done nothing illegal even if the patient uses the drug to hasten death. “Its like surgery,” he says. “We dont call those deaths homicides because the doctors didnt intend to kill their patients, although they risked their death. If youre a physician, you can risk your patients suicide as long as you dont intend their suicide.”【解析】句中共有6个连接词，即含有6个状语从句，其中as long as，if是引导条件状语从句;even if，although是引导让步状语从句;because引导原因状语从句。所以说，状语从句在长难句中的出现频率很高，需要特别重视学习。【参考译文】波士顿大学健康法律系主任乔治安纳斯认为，只要医生是出于合理的医疗目的开药，纵然服用此药后会加速病人的死亡，医生是无罪的。他说：“这就像做手术，我们不能把死亡称作谋杀，因为医生并没有想杀死病人，尽管他们冒着死亡的危险。如果你是一名医生，只要你没有想让病人自杀，你就能冒你的病人自杀的危险。”比较状语从句是9种状语从句(时间、地点、原因、条件、目的、结果、让步、比较和方式)中较难的一种状语从句。要突破比较状语从句，大家首先要清楚可以引起比较的引导词，现列表如下：引导词例示than比Light travels fasterthansound.光传播的速度比声音快。(not) asas(不) 像一样We will give youasmuch helpaswe can.我们会尽可能地帮助你。(not) the same as(不)同一样My stand on the case is justthe same asit was 4 years ago.在这件事上的我的立场同4年前一样。not so much as与其说倒不如说，是不是The great thing in this world isnot so muchwhere we standasin what direction we are moving.人生的意义不在于你目前身在何处，而在于你心向何方。(just) as, so正如，所以Justasdark clouds cannot long hide the sun,sono lies can cover up the fact.乌云遮不住太阳，谎言掩盖不了事实。no lessthan同一样She isno lessactivethanshe sued to be.她仍像过去一样积极。 =She isasactiveasshe used to be.no morethan与不一样The whale isno morea fishthana horse is.鲸不是鱼，正如同马不是鱼一样。not morethan不像一样This book isnot moreinterestingthanthat one.这本书不如那本书更有趣。the the越越The higheryou go,the lessdense air becomes.