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1、2022年高中英語語法專題復(fù)習(xí) 專題十三 狀語從句教案 一、考點聚焦 1、時間狀語從句 （1）as、when、while用法一覽表。 類別 作 用 例 句 as as表示“當(dāng)……的時候”，往往和when/ while通用，但它著重強(qiáng)調(diào)主句與從句的動作或事情同時或幾乎同時發(fā)生。 She came up as I was cooking.(同時) The runners started as the gun went off.(幾乎同時) when (at or during the time that )既可以表示在某一點的時候，又可表示在某

2、一段時間內(nèi)，主句與從句的動作或事情可以同時發(fā)生也可以先后發(fā)生。 It was raining when we arrived.(指時間點) When we were at school, we went to the library every day.(在一段時間內(nèi)) while while意思是“當(dāng)……的時候”或“在某一段時間里”。主句中的動作或事情在從句中的動作或事情的進(jìn)展過程中發(fā)生，從句中的動詞一般要用延續(xù)性動詞。在when表示a period of time時，兩者可以互換。 Please don’t talk so loud while others are workin

3、g. He fell asleep while/when reading. Strike while the iron is hot. (用as或when不可，這里的while意思是“趁……”) （2）引導(dǎo)時間狀語從句的連接詞除上述外還有： ①till, not … until …, until, before, since Don’t get off the bus until it has stopped. He waited for his father until(till)it was twelve o’clock. It will be five years befo

4、re he returns from England. ②hardly / scarcely … when, no sooner … than, as soon as once 表示“一……就” As soon as I have finished it , I’ll give yu a call. Once you show any fear, he will attack you. We had hardly got / Hardly had we got into the country when it began to rain. No sooner had he arr

5、ived / He had no sooner arrived than she started plaining. ③directly, immediately, the moment, the minute that… 一……就 He made for the door directly he heard the knock. ④each time, every time, by the time Each time he came to my city, he would call on me. 注意：表示未來情況，主句用將來時，從句用現(xiàn)在時。 2、讓步狀語從句 （1）al

6、though與though可以引導(dǎo)讓步狀語從句，不能與but連用，但可以與yet連用。 Although they are poor,(yet)they are warm-hearted. （2）even if或even though引導(dǎo)讓步狀語從句，表示“即使”，“縱然”，用來使人注意下文所強(qiáng)調(diào)內(nèi)容的性質(zhì)。 I’ll get there even if(though)I have to sell my house to get enough money to go by air. （3）no matter后接上who、what、where、how等疑問詞，也可以在這類疑問詞后面加上e

7、ver構(gòu)成whoever、whatever、wherever、however等。 Don’t trust him, no matter what / whatever he says. Whoever breaks the law will be published. No matter how hard the work is, you’d better try to do it well. （4）as也可以引導(dǎo)讓步狀語從句。要用倒裝。 Child as(though)he is, he knows a lot. Much as I like it, I won’t buy.

8、Try as he would, he couldn’t lift the heavy box. 3、原因狀語從句：because, for, as, since, now that （1）表示不知道的原因時用because,即說話人認(rèn)為聽話人不知道，因此because從句是全句最重要的部分，通常它被置于主句之后。 You want to know why I’m leaving? I’m leaving because I’m full. for雖然表示不知道的原因，但其語氣較because要弱得多，是可說可不說的話，它只能置于主句之后，這時，for是并列連詞。如果不是因果關(guān)系，而是

9、對前面主句的內(nèi)容加以解釋或推斷時，只能用for。如：It’s morning now, for the birds are singing.（很顯然，鳥叫不可能是“現(xiàn)在已是早上”的原因。） （2）表示已經(jīng)知道的原因時用as或since,即某種原因在說話人看來已經(jīng)很明顯，或已為聽話人所熟悉，因此它是句中不很重要的部分。since要比as正式一些，它們通常被置于語句之前，但有時卻相反。 Seeing all of the children already seated, he said,“Since everyone is here, let’s start.” (3)下列情況下只能使用be

10、cause: ①在回答why的問句時； ②在用于強(qiáng)調(diào)句型時； ③被not所否定時。 4、地點狀語從句：where, wherever Make a mark wherever you have any questions. We will go where the Party directs us. 5、目的狀語從句：that, so that, in order that 注意：目的狀語從句的謂語動詞常與情態(tài)動詞連用，否則可能是結(jié)果狀語從句。不可置于句首。 6、結(jié)果狀語從句：that, so that, so … that, such … that … 注意：so + 形

11、容詞/副詞 + that從句；such +　名詞 + that從句。 7、方式狀語從句：as, as if(though) I’ll do as I am told to. It looks as if it is going to rain. 8、比較狀語從句：than, as 9、條件狀語從句：if, unless, so (as) long as, in case, once, a far as, on condition that. 注意if與unless的區(qū)別：不能用and連接兩個unless從句，即不能有… unless …,and unless … 。但if … no

12、t and if … not卻不受此限。 You won’t lose your weight unless you eat less and unless you exercise more. (×) 但可以說 … unless you eat less and exercise more. 10、注意狀語從句中從句的省略現(xiàn)象 （1）連接詞 + 過去分詞 Don’t speak until spoken to. Pressure can be incrased when needed. Unless repaired, the washing machine is no use

13、. （2）連詞 +　現(xiàn)在分詞 Look out while crossing the street. （3）連詞 + 形容詞/其他 常見的有it necessary、if possible、when necessary、if any等。 二、精典名題導(dǎo)解 選擇填空 1. I don’t think I’ll need any money but I’ll bring some ____________.(NMET xx) A. as last B. in case C. once again D. in time 解析：答案為B。句

14、意為“帶些錢以防萬一”，只能選擇in case。引導(dǎo)的條件狀語從句，后面省略了I should need it。 2. The WTO can’t live up to its name _________ it doesn’t include a country that is home to one fifth of mankind.（NMET xx） A. as long as B. while C. if D. even though 解析：答案為C。本題考查狀語從句的用法。句意為“假如世貿(mào)組織不包括占世界人口五分之一的中國的話，那它就名

15、不副實”。as long as語氣過于強(qiáng)烈，while和even though不符合句意。 3、Someone called me up in the middle of the night, but they hung up_________I could answer the phone.(NMET xx) A. as B. since C. before D. until 解析：答案為C。題意為：半夜里有人打來電話，我沒來得及就掛了。but暗示在接話前就掛了。 4. You should try to get a good nig

16、ht’s sleep much work you have to do. A. however B. no matter C. although D. whatever 解析：答案為A。此題考查連詞用法，依據(jù)結(jié)構(gòu)However +形/副+主語+謂語。故選A。 5. He speaks English well indeed, but of course not a native speaker. A. as fluent as B. more fluent than C. so fluently as D. much fluently than 解析：答案為C。此題考查So adj./adv. As和as adj. / adv. As 用法，前者主要用于否定句，在這里要修飾謂語動詞，故選C。