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1、单元语法归纳与练习单元语法归纳与练习从属连词从属连词when,before,becausewhen,before,because和和 ifif1.1.从属连词通常引导一个从句从属连词通常引导一个从句, ,修饰主句。一般分为两类修饰主句。一般分为两类: :引导名词性从引导名词性从 句的从属连词和引导状语从句的从属连词。句的从属连词和引导状语从句的从属连词。2.2.英语连词的用法讲解when意为“当的时候”,引导时间状语从句时,该从句可放在主句之前,也可放在主句之后。before意为“在之前;还没来得及就;趁还没”。becausebecause意为“因为”,表示因果关系。ifif意为“如果;假如”
2、,引导条件状语从句;意为“是否”时,引导宾语从句。When I saw When I saw him,hehim,he was writing to a friend of his.=He was writing was writing to a friend of his.=He was writing to a friend of his when I saw him.to a friend of his when I saw him.我看见他时我看见他时, ,他在给一个朋友写信。他在给一个朋友写信。Please finish your homework before I come bac
3、k.Please finish your homework before I come back.在我回来之前在我回来之前, ,请把作业做完。请把作业做完。Before our teacher Before our teacher leaves,youleaves,you can ask him more questions. can ask him more questions.趁着老师还没走趁着老师还没走, ,你可以多问他几个问题。你可以多问他几个问题。I canI cant go to school because I am ill.t go to school because I am
4、 ill.因为我病了因为我病了, ,所以我不能去上学。所以我不能去上学。If my mother comes If my mother comes back,Iback,Illll ring you up. ring you up.如果我妈妈回来了如果我妈妈回来了, ,我就给我就给你打电话。你打电话。( (引导条件状语从句引导条件状语从句) )I donI dont know if he will come to my birthday party.t know if he will come to my birthday party.我不知道他是否会来参加我的生日聚会。我不知道他是否会来参加
5、我的生日聚会。( (引导宾语从句引导宾语从句) )温馨提示温馨提示: :上述从属连词上述从属连词beforebefore和和if(if(引导条件状语从句引导条件状语从句) )用于表示将来的用于表示将来的意思时意思时, ,通常遵从通常遵从“主将从现主将从现”的时态规则的时态规则, ,即主句用一般将来时即主句用一般将来时, ,从句用从句用一般现在时表示将来一般现在时表示将来; ;当当whenwhen用于一个动作正在进行用于一个动作正在进行, ,另一个动作发生了的另一个动作发生了的情况时情况时, ,正在进行的动作通常用过去进行时。正在进行的动作通常用过去进行时。例如例如:If Tom studies
6、 :If Tom studies hard,hehard,hellll catch up with others. catch up with others.如果汤姆努力学习如果汤姆努力学习, ,他会赶上别人的。他会赶上别人的。( (主将从现主将从现) )When I got When I got home,myhome,my parents were watching TV. parents were watching TV.当我到家的时候当我到家的时候, ,父母正在看电视。父母正在看电视。一、根据汉语意思完成句子一、根据汉语意思完成句子1.1.在我关窗户之前在我关窗户之前, ,就开始下雨了
7、。就开始下雨了。 I I the the window,itwindow,it began to rain. began to rain.2.2.如果没有阳光如果没有阳光, ,万物不能生存。万物不能生存。 there is there is sunshine,everythingsunshine,everything can cant live.t live.3.3.当我走过珍妮时当我走过珍妮时, ,她正在读书。她正在读书。 JennyJenny a book a book I passed by her.I passed by her.4.4.因为天气不好因为天气不好, ,所以我们没有去那儿
8、。所以我们没有去那儿。 the weather was the weather was bad,webad,we there.there.5.5.你能告诉我明天是否会有会议吗你能告诉我明天是否会有会议吗? ? Could you tell me Could you tell me a meeting a meeting tomorrow? tomorrow?BeforeBeforeclosedclosedIfIfnonowaswasreadingreadingwhenwhenBecauseBecausedidndidnt tgogoififtheretherewillwillbebe二、单项选
9、择二、单项选择( )6.I was very excited ( )6.I was very excited I heard the news that the high-speedI heard the news that the high-speed rail would be built from Guangzhou to Xiamen rail would be built from Guangzhou to Xiamen.(2015.(2015汕尾汕尾) ) A.afterA.afterB.whenB.whenC.untilC.until D.whileD.while( )7.You
10、 will be late for school ( )7.You will be late for school you donyou dont get up early.t get up early. A.butA.butB.ifB.if C.andC.and D.orD.or( )8.You( )8.Youd better make a good plan d better make a good plan you take a holiday.you take a holiday. A.beforeA.before B.duringB.during C.untilC.until D.a
11、fterD.after( )9.We didn( )9.We didnt enjoy the day t enjoy the day the weather was so bad.the weather was so bad.(2015(2015杭州杭州) ) A.becauseA.becauseB.thoughB.though C.unlessC.unless D.tillD.till ( )10.( )10.Mum,Mum, shall we have lunch?shall we have lunch? We will have it when your dad We will have
12、 it when your dad .(2015.(2015安顺安顺) ) A.when;returnsA.when;returnsB.where;willB.where;will return return C.where;returnsC.where;returns D.when;willD.when;will return returnB BB BA AA AA A单项选择单项选择( )1.Making ( )1.Making contact can show you are a good listener.contact can show you are a good listener
13、. A.eyeA.eyeB.eyesB.eyes C.earC.earD.earsD.ears( )2.I find ( )2.I find difficult to do the job well.difficult to do the job well. A.thisA.this B.thatB.that C.itC.itD.oneD.one( )3.My friend studies ( )3.My friend studies .He is a good student.He is a good student. A.hardA.hard B.hardlyB.hardly C.care
14、lesslyC.carelesslyD.carefulD.careful( )4.Lucy wants to find out ( )4.Lucy wants to find out the problem is.the problem is. A.whyA.whyB.whereB.where C.whatC.whatD.whoD.who( )5.( )5.Do you mind my using your computer?Do you mind my using your computer? . . A.CertainlyA.Certainly not not B.Yes,pleaseB.
15、Yes,please C.Sorry,IC.Sorry,I won wont tD.NeverD.Never mind mindA AC CA AC CA A【易错提醒易错提醒】 1. 1.易错选易错选B,B,错误地以为人长着两只眼睛错误地以为人长着两只眼睛, ,应该用复数。可固定短语是应该用复数。可固定短语是:eye contact:eye contact眼神交流。眼神交流。 2.2.易错选易错选A A或或B,B,单纯从汉语意思上来看就觉得单纯从汉语意思上来看就觉得thisthis或或thatthat都行都行, ,但本题但本题考查的是形式宾语考查的是形式宾语(it),(it),来代指后面的动
16、词不定式。来代指后面的动词不定式。 3.3.此题易错选此题易错选B B。误以为。误以为hardlyhardly是是hardhard的副词形式。实际上的副词形式。实际上,hardly,hardly的的意思和意思和hardhard的意思不相关的意思不相关,hard,hard困难的困难的(adj.);(adj.);努力地努力地( (adv.),hardlyadv.),hardly adv. adv.几乎不。几乎不。 4.4.易错选易错选B B。受汉语意思。受汉语意思( (问题在哪儿问题在哪儿?)?)的影响。殊不知的影响。殊不知,where,where是副词是副词, ,不能在句中作不能在句中作isis的表语的表语, ,但但whatwhat是代词是代词, ,可以有这种用法。可以有这种用法。 5.5.易错选易错选D D。只注意到了问句中有。只注意到了问句中有mind,mind,便不假思索地选择便不假思索地选择D,NeverD,Never mindmind没关系没关系, ,用来回答道歉的用语。用来回答道歉的用语。
