3-常考语法点拨.ppt

让步状语从句 1. whatever, whoever, however, whenever, wherever 等引导让步状语从句： (3) 注意however以下两类句型结构： ① however+主语+谓语： However you travel, it’ll take you at least three days. ② however+形容词或副词+主语+谓语： However much he eats, he never gets fat. However cold it is, she always goes swimming. 让步状语从句 2. 让步状语从句倒装： 通常用as和though，但不是能用although： n./adj./adv./v +as +主语＋谓语 Young as he is, he can read and write in several foreign languages. Child as he was, he had to support the family. （表语名词提前并常省去冠词） 方式状语从句 常用的引导词有as，as if，as though，the way等。 方式状语从句所表示的情况不是事实，而是主观的想象或夸大性的比喻，通常用虚拟语气。表示现在的情况用过去时，表示过去的情况用过去完成时。 Everything in my childhood crowded upon in my mind(涌上心头) as if they had just happened. 比较状语从句 1. as … as…：和…一样【肯定句】 not as(so) …as…【否定句】 倍数要放在as…as…之前 This room is (twice) as big as that one. 2. 比较级 + than：比… This room is bigger than that one. 3. the + 比较级…, the + 比较级…：越…越… The bigger the room is, the better one feels. 4. 比较级 + and + 比较级：越来越 The days are longer and longer. 1. A man escaped from the prison last night. It was a long time ________ the guards discovered what had happened. A. before B. until C. since D. when 【解析】考查时间状语从句。It + be +一段时间+before 一段时间之后；Escape和discover先后发生。 【答案】A 【翻译】昨晚一个囚犯越狱。很久之后，守卫才发现。 状语从句练习题 2. Scientists say it may be five or six years ________ this medicine is tested on human beings. A. since B. before C. after D. when 【解析】考查时间状语从句。 It + be +一段时间+before 一段时间之后。 【答案】B 【翻译】科学家们说这种药可能要五六年之后才能在人类身上进行测试。 状语从句练习题 3. I recognized John _______ he entered the room. A. hardly B. the minute C. no sooner D. at once 【解析】考查时间状语从句的引导词。 Hardly几乎不，和when搭配，意为“一…就…”； The minute 引导时间状语从句，意为“一…就…”； No sooner…than…引导时间状语从句，意为“一…就…”； At once立刻，马上 【答案】B 【翻译】约翰一进房间我就认出他来了。 状语从句练习题 4. Although he knew little about the large amount of work done in the field, he succeeded ________ other more well-informed experimenters failed. A. as B. unless C. what D. where 【解析】考查地点状语从句。 【答案】D 【翻译】尽管他对于这个领域内大量已完成的工作知之甚少，但是他却在这个其他人了解却失败的领域取得了成功