经典句型课件(unit1).ppt

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1、Unit 1 Great Scientists 经典句型经典句型讲解讲解1杰克每次来城里都会来看望我。Jack will drop in on me _ _he comes to town.2我只有找到工作才能有足够的钱继续大学的学业。_ _ _ _ _ _ _ _ _ _ _to continue my studies at college.答案1.every time2Only if I get a job can I have enough money考点1 So many thousands of terrified people died every time there was a

2、n outbreak.每次爆发霍乱时，都有大批惊恐的老百姓病死。every time 引导一个时间状语从句，相当于whenever，意思是“每当”。(1)名词词组作连词用，引导时间状语从句的有：every time，each time，any time，the last time，next time，the first time，the moment，the second，the minute，the hour，the day 等。(2)有些副词，如directly，instantly，immediately 也可用作连词，引导状语从句。【典例填充】1._ _I catch a cold，I

3、have pains in my back.我每次感冒背就痛。答案Every time2 She let out a cry _ _she saw the snake.她一看到蛇就叫了起来。答案the moment3I left _the clock struck 5.钟刚敲了五下我就离开了。答案immediately考点2Only if you put the sun there did the movements of the other planets in the sky make sense.只有当你把太阳放在中心位置上，天空中其他行星的运动才能说清楚。only 修饰if 引导的条件

4、状语从句。“only状语”放在句首时，句子要用部分倒装结构；only 加主语放在句首时，句子不倒装。Only in this way can you get to know her.if only表示“要是该多好”，指一种不能实现或难以实现的愿望。用于虚拟语气，表示过去不能实现的愿望，含有后悔、惋惜之意，谓语动词使用had done形式。表达现在不可实现的愿望，谓语动词用一般过去时；表达将来难以实现的愿望，谓语动词用“would/could等情态动词动词原形”或一般过去时。If only I knew her.If only I had been here last night.If only

5、 I would be here tomorrow,but I will have to go to school.【典例填充】_只要红灯一亮，就表示有危及职工的险情。答案Only if the red light comes on is there some danger to employees.1_you talk to someone or write a message，you show your skills to others.AAt times BSome timeCEvery time DThe time解析句意：每次你同别人谈话或写信息时，把你的技巧显露出来。every t

6、ime“每当的时候”，引导时间状语从句；其他三项都不能引导时间状语从句，故可排除。答案C2Dont stop_you meet with a word you dont understand.Aat the time Beach timeCby the time Dsometimes解析根据句子结构可知，选用的短语应起连词作用，引导时间状语从句，故选用each time。at the time 为 介 词 短 语，不 能 引 导 句 子；sometimes 为副词，也不能引导时间状语从句；by the time 可以引导时间状语从句，但其主句常用完成时态。故选B项。答案B3I didnt in

7、vite him to the party but he came anyway and got completely drunk._he hadnt come!The party could have been a success.AHow come BIf onlyCWhat if DOnly if解析If only.!“要是就好了！”，其后的句子常用虚拟语气；How come“为什么，怎么会”；What if“要是会怎么样”；Only if“只要，只有”。句意：我没邀请他参加聚会，但他却来了，而且喝得酩酊大醉。要是他不来就好了，那样聚会就会举办得很成功。根据句意应选B项。答案B4Only

8、 after you have reached eighteen _ the army.Ayou can join Byou can join inCcan you join Dcan you join in答案C 能力提升.单词拼写1There are many new _(科学的)discoveries.答案scientific2He smiled suddenly,_(露出)a set of amazing white teeth.答案exposing3A dropped cigarette is being _(指责)for the fire.答案blamed4The governme

9、nt yesterday _(宣布)to the media to create a million new jobs.答案announced5We must take _(积极的)steps to deal with the problem.答案positive6 It took the jury some time to reach the _(结论)that she was guilty.答案conclusion7The family has sold most of its shares and will lose _(控制)of the company.答案control8Black

10、 walls _(吸引)a lot of heat during the day.答案absorb9The writer personally _(捐助)$5000 to the earthquake fund.答案contributed10We got excited when our school football team _(击败)theirs at yesterdays game.答案defeated.选词填空put forward；be strict with；apart from；contribute to；make sense 1Do you agree with the pl

11、an he _ _in the discussion?答案put forward2You _ _ _your students.答案are strict with3 _ _what he said，you also need to ask for your parents advice.答案Apart from4Cigarette smoking is a major factor _ _lung cancer.答案contributing to5Dont waste time thinking about a sentence which doesnt _ _.答案make sense.易错

12、补练1Most people didnt accept the theory when it was first_.Aset aboutBset offCput forward Dput out解析句意：当那个理论刚被提出时，大多数人不接受。set about 着手；set off 出发；put forward 提出；put out 扑灭。答案C2 I dont doubt_the medicine is_effect for cancer.Athat；a cure of Bif；cure ofChow；a cure for Dthat；cure for解析I dont doubt 后接tha

13、t 引导的从句，意为“我不怀疑”；a cure of effect for.“对的有效治疗”。答案A3The parents didnt know_to blame for the spoiled child.Awho BwhenChow Dwhat解析考查“疑问词不定式”的用法。blame 的常用结构为blame sb.for(doing)sth.。即本题中blame 后缺少宾语，此处用who 代替whom 作blame 的宾语，相当于一个宾语从句who the parents should blame for the spoiled child。句意：这对父母不知道谁该对这个被溺爱的孩子负

14、责。答案A4Mr.Bake is a professor of physics._，he is a famous writer.AExcept BApart fromCIn addition DBeside解析考查介词短语辨析。分析句子结构，此处需要一个副词，而A、B、D三个选项均为介词，后面需接名词、代词或动名词作宾语；in addition 表示“此外”，为副词短语，当其为介词时，后面需接to，构成in addition to(besides)。答案C5 There are so many new words and expressions in the article that the

15、students cant make any_of them at all.Aidea BsenseCuse Dmeaning答案B.单元语法(过去分词做定语和表语)1The body of US.diplomat Victoria DeLong，the first American reported_by the earthquake in Haiti，has arrived in Los Angeles.Akilled BkillingCbeing killed Dhaving killed解析句意：被报道第一位在海地大地震中丧生的美国外交官Victoria DeLong 的遗骸已经运抵洛

16、杉矶。由于kill和the first American 之间为动宾关系，故用过去分词形式。being killed 是现在分词的被动式，强调被动的动作正进行。答案A2The man_of shooting 6 school children was caught by Beijing police，the XINHUA News Agency reported on Friday.Abeing suspected BsuspectingCsuspected D.to be suspected解析句意：新华社周五报道说那个涉嫌枪杀了6名学生的人已被北京警方抓获。suspect 和the man

17、 之间为动宾关系，故用过去分词形式作定语。答案C3The survery_in our school last month shows that about 2 percent of the students are addicted to Internet games.Aconducted Bhaving been conductedCconducting Dto be conducted解析动词conduct 与主语the survey 之间存在着动宾关系，所以需用被动形式，依据last month 可知，该动作发生在过去，故C、D两项不正确。B项是现在分词的完成被动式，通常不能作定语。c

18、onducted 在此作定语修饰the survey，相当于定语从句which was conducted。答案A4About 30 men lifted a school bus to save a pregnant woman _ by the bus，_ it possible for the baby to be born before the woman died of her injuries.Astruck；making Bstriking；madeCstruck；made Dstriking；making解析strike 和woman 之间为被动关系，故用过去分词短语struck.作定语；而make 和前面的句子构成逻辑上的主谓关系，故第二个空用现在分词making。句意：大约有三十个人抬起公共汽车来挽救一个被车撞伤的怀孕妇女，确保在这位妇女因受伤过重而死亡之前婴儿能安全出生。答案A5_，a car knocked her down.AWhile crossing the streetBWhile she was crossing the streetCShe crossed the streetDCrossed the street解析前后的句子主语不同，故这个从句不能用非谓语动词的形式，要用从句。句意：当她过马路时，一辆车撞倒了她。故B项正确。答案B