專項十二 狀語從句,一、讓步狀語從句 讓步狀語從句的常用連詞有 although, though, even if, even though, as(從句需要倒裝), while (一般置于句首), no matter 疑問詞， 疑問詞ever。,Part,規(guī)律印證 考 點 落 實 ， 步 步 為 “ 贏 ”,邊 做 邊 悟,(2013·江蘇卷)In the global economy, a new drug for cancer, _ it is discovered, will create many economic possibilities around the world. 答案 wherever 分析句子結構可知，“_ it is discovered”為狀語從句，空處在從句中作地點狀語，因此選wherever“無論在哪里”，引導讓步狀語從句。 (2013·遼寧卷) One can always manage to do more things, no matter _ full one's schedule is in life. 答案 how 句意：一個人不論他生活中的日程有多么滿，總是能設法做更多的事情?？蘸竺娴膄ull是形容詞，所以應該用how修飾，no matter how引導讓步狀語從句。,(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。即使他想陪他的兒子也沒有足夠的時間。even if引導讓步狀語從句。,二、時間狀語從句 1when引導時間狀語從句，意為“正在這時”，表示某件事正發(fā)生或剛剛發(fā)生時，突然發(fā)生另一動作： be about to do.when.正在做某事這時；be doing.when.正在做某事這時；be on the point of doing.when.；正在做某事這時；had just done.when.剛做某事這時 (全國卷) 湯姆正要關窗戶，這時他的注意力被一只鳥吸引住了。 Tom _ when his attention was caught by a bird.,(浙江高考) 一個星期五，我們正在收拾行李去度周末，這時我的女兒聽到求救的呼喊。 One Friday, we were packing to leave for a weekend away _ my daughter heard cries for help.,2下列結構表示“一就”： as soon as, immediately, directly, instantly, the moment, the minute, the instant, no sooner.than., hardly/scarcely.when. 我一聽到那個聲音就知道父親來了。 _ I heard the voice，I knew father was coming. 他剛完成演講學生們就開始歡呼起來。 No sooner had he finished his speech _ the students started cheering.,3before (1)表示“還未就；不到就；才；趁；還沒來得及就”。 The girl had hardly rung the bell before the door was opened suddenly, and her friend rushed out to greet her. 小女孩還沒來得及按門鈴，門就突然開了，并且她的朋友沖出來問候她。,(2)It will be一段時間before.“多久之后才”。 It is一段時間since.“自從多久了”。 據(jù)報道，自清華大學建立以來已有一百多年了。 As is reported, it is over 100 years _ Qinghua University was founded. 還得再過半年我才能回來。 It will be half a year _ I come back.,4by the time by the time 表示“到的時候”。當從句是時間狀語從句時，主句要用完成時。 當你回來的時候，我們將已完成這項工作。 By the time you come back, we _. 我們到的時候，他已經(jīng)種了10棵樹了。 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、條件狀語從句 條件狀語從句的常用連詞有if, unless, as/so long as(只要), only if(位于句首主句要倒裝), in case, on condition that等。 (2013·江西卷)她說她將不得不關掉商店，除非生意好轉。 She says that she'll have to close the shop _ business improves., 只要一個人給別人的生活帶來價值，那么他的生命就有價值。 One's life has value _ one brings value to the life of others. 學生一旦決定上哪所大學，他們就應該了解一下入學手續(xù)。 _ they decide which college to go to, students should research the admission procedures. 答案 unless as long as Once,1【誤】 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 從句中不能用表示將來的 will，be going to 等，但可以使用if sb/sth is to do sth 結構。,考 點 警 示,2【誤】 You will be late unless you will leave immediately. 【正】 You will be late unless you leave immediately. 解析 時間、條件、讓步、方式等狀語從句中，用一般現(xiàn)在時表示將來時。 3【誤】 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 從前后兩個句子之間的邏輯關系可知，應用 even if 。even if 即使；as if 好像。,4【誤】 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.置于句首時，主句應使用部分倒裝結構。 5【誤】 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 引導的從句作 agree with 的賓語，即作賓語從句，whatever 不能與 no matter what 替換。而引導狀語從句時可替換。,一、as引導的讓步狀語從句與 although引導的讓步狀語從句的比較 although引導讓步主語從句句子為正常語序，而as引導讓步狀語從句用倒裝。 盡管有規(guī)律的鍛煉是很重要的，但是在臨近就寢的時候進行鍛煉絕不是一個好主意。 _ regular exercise is very important, it's never a good idea to exercise too close to bedtime. 答案 Although,易 錯 防 范,二、時間狀語從句中since與before的比較 since引導時間狀語從句表示“自從以來”，主句常用完成時；before表示“在之前；還未就；還未來得及就”等，常構成句式：It was not long before.，It will be some time before.等。試比較： 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·陜西卷)I have heard a lot of good things about you _ I came back from abroad. 答案 before since before since,