高考英语大一轮复习 专项12 状语从句课件.ppt

专项十二 状语从句,一、让步状语从句 让步状语从句的常用连词有 although, though, even if, even though, as(从句需要倒装), while (一般置于句首), no matter 疑问词， 疑问词ever。,Part,规律印证 考 点 落 实 ， 步 步 为 “ 赢 ”,边 做 边 悟,(2013·江苏卷)In the global economy, a new drug for cancer, _ it is discovered, will create many economic possibilities around the world. 答案 wherever 分析句子结构可知，“_ it is discovered”为状语从句，空处在从句中作地点状语，因此选wherever“无论在哪里”，引导让步状语从句。 (2013·辽宁卷) One can always manage to do more things, no matter _ full one's schedule is in life. 答案 how 句意：一个人不论他生活中的日程有多么满，总是能设法做更多的事情。空后面的full是形容词，所以应该用how修饰，no matter how引导让步状语从句。,(2013·四川卷) He is so busy.He cannot afford enough time with his son _ he wants to. 答案 even if 句意：他很忙。即使他想陪他的儿子也没有足够的时间。even if引导让步状语从句。,二、时间状语从句 1when引导时间状语从句，意为“正在这时”，表示某件事正发生或刚刚发生时，突然发生另一动作： be about to do.when.正在做某事这时；be doing.when.正在做某事这时；be on the point of doing.when.；正在做某事这时；had just done.when.刚做某事这时 (全国卷) 汤姆正要关窗户，这时他的注意力被一只鸟吸引住了。 Tom _ when his attention was caught by a bird.,(浙江高考) 一个星期五，我们正在收拾行李去度周末，这时我的女儿听到求救的呼喊。 One Friday, we were packing to leave for a weekend away _ my daughter heard cries for help.,2下列结构表示“一就”： as soon as, immediately, directly, instantly, the moment, the minute, the instant, no sooner.than., hardly/scarcely.when. 我一听到那个声音就知道父亲来了。 _ I heard the voice，I knew father was coming. 他刚完成演讲学生们就开始欢呼起来。 No sooner had he finished his speech _ the students started cheering.,3before (1)表示“还未就；不到就；才；趁；还没来得及就”。 The girl had hardly rung the bell before the door was opened suddenly, and her friend rushed out to greet her. 小女孩还没来得及按门铃，门就突然开了，并且她的朋友冲出来问候她。,(2)It will be一段时间before.“多久之后才”。 It is一段时间since.“自从多久了”。 据报道，自清华大学建立以来已有一百多年了。 As is reported, it is over 100 years _ Qinghua University was founded. 还得再过半年我才能回来。 It will be half a year _ I come back.,4by the time by the time 表示“到的时候”。当从句是时间状语从句时，主句要用完成时。 当你回来的时候，我们将已完成这项工作。 By the time you come back, we _. 我们到的时候，他已经种了10棵树了。 He _by the time we arrived. 答案 was about to close the window when The moment than since before will have finished the job had planted 10 trees,三、条件状语从句 条件状语从句的常用连词有if, unless, as/so long as(只要), only if(位于句首主句要倒装), in case, on condition that等。 (2013·江西卷)她说她将不得不关掉商店，除非生意好转。 She says that she'll have to close the shop _ business improves., 只要一个人给别人的生活带来价值，那么他的生命就有价值。 One's life has value _ one brings value to the life of others. 学生一旦决定上哪所大学，他们就应该了解一下入学手续。 _ they decide which college to go to, students should research the admission procedures. 答案 unless as long as Once,1【误】 In such dry weather，the flowers will have to be watered if they are going to survive. 【正】 In such dry weather，the flowers will have to be watered if they are to survive. 解析 if 从句中不能用表示将来的 will，be going to 等，但可以使用if sb/sth is to do sth 结构。,考 点 警 示,2【误】 You will be late unless you will leave immediately. 【正】 You will be late unless you leave immediately. 解析 时间、条件、让步、方式等状语从句中，用一般现在时表示将来时。 3【误】 Mum would not let him buy it，as if he had enough money ! 【正】 Mum would not let him buy it，even if he had enough money! 解析 从前后两个句子之间的逻辑关系可知，应用 even if 。even if 即使；as if 好像。,4【误】 Not until I began to work I realized how much time I had wasted. 【正】 Not until I began to work did I realize how much time I had wasted. 解析 not until.置于句首时，主句应使用部分倒装结构。 5【误】 I won't agree with no matter what you may say. 【正】 I won't agree with whatever you may say. 【正】 Whatever /No matter what you may say，I won't agree. 解析 whatever 引导的从句作 agree with 的宾语，即作宾语从句，whatever 不能与 no matter what 替换。而引导状语从句时可替换。,一、as引导的让步状语从句与 although引导的让步状语从句的比较 although引导让步主语从句句子为正常语序，而as引导让步状语从句用倒装。 尽管有规律的锻炼是很重要的，但是在临近就寝的时候进行锻炼绝不是一个好主意。 _ regular exercise is very important, it's never a good idea to exercise too close to bedtime. 答案 Although,易 错 防 范,二、时间状语从句中since与before的比较 since引导时间状语从句表示“自从以来”，主句常用完成时；before表示“在之前；还未就；还未来得及就”等，常构成句式：It was not long before.，It will be some time before.等。试比较： He hung up _ I could explain what had happened. It is three years _ he came to work in our school. It will be two weeks _they finish the work. (2013·陕西卷)I have heard a lot of good things about you _ I came back from abroad. 答案 before since before since,