初中英语状语从句教案及精品练习讲解.doc

【精品文档】如有侵权，请联系网站删除，仅供学习与交流初中英语状语从句教案及精品练习讲解.精品文档.新课标初中英语状语从句教案及精品练习讲解掌握状语从句的作用。掌握状语从句的意义。掌握各种不同类型的状语从句。【知识要点】状语从句在句中作状语，修饰句中的动词、形容词或副词等。状语从句由从属连词作关联词，从属连词在从句中不充当句子成分。状语从句在主句之前，一般要用逗号分开，朗读时用升调。状语从句在主句之后，一般不用逗号，朗读时用降调。状语从句按其意义和作用可分为时间、条件、原因、让步、目的、结果、方式、比较、地点等类型。1.       时间状语从句  (1) 常用的连词有when（当时候），while（当时候）,before(在以前)，after（在以后），until(till)（直到为止）,since（自从以来）, as soon as（一就）等。(2) 时间状语从句中一般不用将来时，若谈论将来的事情，往往用一般现在时代替：如：I'll go on with the work when I _ (come) back tomorrow.As soon as he _(finish) the work, he will come to see me.2.       条件状语从句常由if (假如、如果) No matter (不管) 来引导，如果主句是一般将来时，从句往往用一般现在时来表示将来。如： I'll go for a picnic if it _(be) fine. No matter what he _(say)，I won't believe him，3.       原因状语从句(1) 常由because, since, as引导。(2) because表示直接的原因，着重点在从句，用于回答why, 语气最强。 because 不能与 so 连用。since一般表示对方已知的，无须加以说明的既成事实的理由，全句中心在主句，语气比because弱，常译为“既然”。as表示十分明显的原因，一般说明因果关系，着重点在主句，语气较弱。常译为“由于”。for是个并列连词，只能放在另一个并列分句后面，表示一种推理或解释，或用作附加说明，而不是指理由或原因，语气最弱，一般不放在句首，常译成“因为”。如：_ it is raining hard, we won't go hiking._ you are ill, I'll go alone. I can't go to school _ I am ill. You haven't met him, _ he didn't come here.4.       结果状语从句一般由so.that, such.that引导，so 与such的区别： (1) so形容词a / an名词   (2) sucha / an形容词名词  （3）such形容词不可数名词 / 可数名词复数   (4) somany / much / few / little形容词名词                                             如：It's _ a heavy box that nobody can move it.    It's _ heavy a box that nobody can move it.There are _many books in the library5.       目的状语从句往往由so that,引导，如：I'll speak slowly_ you can understand me.6.       比较状语从句常由as.as, than, not as / so.as等引导。比较从句部分常是省略句，如：I'm taller _ he (is).Science is not _ popular _ English.7.       让步状语从句由though或although (虽然) 等引导，但不能与but同时连用，改错：Though it snowed heavily,but they kept on working.1.       方式状语从句常用as if ,as though（好像）引导。如：He acted as if (though) nothing had happened. 2.       地点状语从句常用where, wherever引导。如：I'll go where work is hard. 【典型例题解析】例1  The question was _ difficult that nobody could answer_.A. very.them    B. very.it       C. so.them       D. so.it 解析  因为句中有that,所以前面用so,构成sothat从句，而question是单数，用代词it，故选D。例2  It was _that he had to ask for help.A. such big work  B. so big a work    C. so a big work  D. such big job解析  work是不可数名词，指工作或工程，故选A。例3         He won't believe it _ he sees it with his own eyes.A. when           B. after           C. until            D. as soon as 解析  此句是notuntil,“直到才”。故答案选C。例4  I'll go _ with you _ next Sunday.A.     hunting.when I will have timeB. to hunt.until I'm freeC.     boating.if I have nothing to doD. to boat.as I will not be so busy解析  去打猎、划船常用go hunting, go boating，所以应在A和C中选择，又因为when和if在句中引导状语从句时，要用一般现在时表示将来，故选C。例5  It's almost three years _ I last saw her.A. since          B. when            C. that              D. after 解析  本句表示自从上次见到她几乎有三年了，句型It's+时间段+since从句(过去时)，故选A。 【选讲例题】用所给动词适当形式填空例6  I'll go to Shanghai if I _ (have) time tomorrow.And I want to know if you _ (have) time to go with me.解析  第一句中if是“假如”的意思引导状语从句，要用一般现在时表示将来时，第二句中if是“是否”的意思，引导宾语从句，仍用将来时。例7  Could you tell me when he _ (return) home next week?Sorry, I can't. But I will ring you up when he _ (return) home. 解析  第一句中的when意思是“什么时候”，引导宾语从句用将来时态，第二句中的when是“当时”的意思，引导时间状语从句，用一般现在时表示将来。 【课内追踪练习】单项选择(   ) 1.Jack was tired _he played tennis all afternoon.A. if       B. as soon as      C. because          D. before (   ) 2_ he finished his work, he left hurriedly.A. As soon as       B. In order that       C. Until     D Since(   ) 3._the rain has stopped, let's start again.A. For      B.   Because      C. Since            D What(   ) 4.He started early _ he could get there before nine.A. so that  B. because     C. so as to     D. in order to(   ) 5.They waited _ it was dark outside.A. since          B. until       C. so           D. while 【复习小结】1.       牢记引导各类状语从句的连词及它们的不同意义和作用。2.       注意区别when（什么时侯）引导宾语从句、（当时）引导状语从句；if（是否）引导宾语从句、（假如）引导条件状语从句； sothat、so that、suchthat3.       注意用一般现在时表示将来的几种句式。 【巩固练习】一、单项选择(  ) 6.Mike is _ boy that we all like him.A. a good so      B. so good a   C. a such good  D. such good a(  ) 7.It was _that they wanted to go for a picnic in the country.A. such a fine weather                 B. so fine a weatherC. a fine weather so                   D. such fine weather(  ) 8.Ships are_ than planes that few people take them on business.A. too much slower                      B. very much slowerC. so much slower                       D. much more slower(  ) 9.They had started harvesting rice _ the rain began.A. after         B. before       C. since         D. as 二、在下列各句中填入适当的状语从句连词，使句子意思完整、通顺10   I will tell you the secret_ you don't tell anyone else about it.11   Mary always takes a seat in the first row _she can hear better.       12.  We didn't notice anything wrong with the computer _we started using it.    13.  The young doctor was a bit worried _ it was his first time to operate on a patient.14   The elephant has _strong a body _it can do heavy work for people.15.   It is _ a difficult problem _ nobody can work it out.  三、句型转换16   Use your head, then you'll find a way._ you use your head, you'll find a way.17   I went to bed after my father came back home yesterday.I _ go to bed _ my father came back home yesterday.18   The island is so beautiful that it can attract large numbers of people.The island is beautiful _      _ attract large numbers of people.19   My dress is more expensive than Lily's.Lily's dress is _  _ expensive as mine.20      My sister is so young that she cant go to school. My sister is _ young _ go to school.