选修八unit知识点

1、Unit 5 Meet ing your an cestors单元要点预览（旨在让同学整体了解本单元要点）词 汇部 分词语 辨析1. used to / would2. in terrupt / disturb / bother3. assume / suppose / presume词形 变化1. alternativen.c替换物adj.选择性的，二中择一 的alter nativelyadv.作为选择，二者择一2. accuracy n.u精确性，正确度accurate adj.正确 的，精确的in accurate adj.不准确的accurately adv.正确地，精 确地in a

2、ccurately adv.不准确地3. assume vt.假定；设想;采用；承担assumpti on n.假定，设想，假装，就职assumed adj.假定的，假装的，装的4. an alysis n .c分析，分解an alyse(a nalyze)vt.分析，分解an alytical adj.分析的，解析的5. significaneen.意义，含义；重要性，重大sig ni fica nt adj.相当数量的；意义重大 的significantly adv.意义深远地，重大地6. divisionn.分（开，配，担；歧，裂）；除（法）；部门divide vt.分(开)；vi.分开

3、7. skill n.c,u技能，技巧，熟练，巧妙skillful adj.灵巧的，熟练的，制作精 巧的skillfully adv.巧妙地，技术好地重点 单词1. i nterrupt vt.& vi.阻断，中断；打岔；插嘴2. applaud vt.鼓掌，称赞，赞成3. accelerate vt.加速，促进4. arrest vt.逮捕，拘留，吸引（注意）n.c逮捕重点 词组1. regardless of不管；不顾2. fed up with受够了，厌烦3. look ahead向前看；为将来谋划4. date back to.追溯到. ，从.时候就有了重点句型1. Wehav

4、e been excavating layers of ash almost six metres thick, which suggests thatthey might have kept the fire burning all win ter.2. Our evide nee suggests they did in deed wear clothes made form ani mal sk in s.重点语法复习现在进行时（见语法部分）语言要点（模块）I词语辨析（旨在提供完形填空所需材料）1. used to / would【解释】would与used to都可用来表示过去经常性或

5、习惯性的动作。would只能表示反复发生的动作。如果表示过去经常性的状态，就不能用would，只能用used to。used to表示过去经常性或习惯性的动作或状态，但现在已经结束。would则表示有可能再发生。【练习】用used to或would填空。1) . Whe n we were boys we_ go swimmi ng every summer.2) . He_be very poor.3) . People_ believe that the earth was flat.4) . He_go to the park as soon as he was free.Keys: 1

6、). used to / would 2). used to 3). used to 4). would (现在有可能再去)2. in terrupt / disturb / bother【解释】in terrupt意为打断，中断，尤指中断某活动的连续性。disturb意为“因焦虑、失望、困惑等情感因素而使人心绪收到明显干扰”。bother意为“扰乱某人心绪而使人不能专心或专一”。【练习】选择interrupt，disturb，bother的正确形式填空。1) . She was_to hear of your ill ness.2) . Im sorry to _the meeti ng,

7、but there is an urge nt Ion g-dista neecallfor Mr. Zhou.3) . Don t _yourself too much about me.4) . We_ in the middle of our con versati on.Keys: 1). disturbed 2). i nterrupt 3). bother 4). were in terrupted3. assume / suppose / presume【解释】assume“假定，设想”，用于逻辑推理，强调一种缺乏证据的结论，以检验某种建议。suppose意为“根据一定证据作出的

8、见解”，最不正式。presume意为“某人以过去的经验作为依据，对某事作出合乎逻辑的推测”。【练习】选择assume，suppose，presume的正确形式填空。1) . I_ that he has gone for a walk.2) . We_ the situatio n will improve.3) . From the available data it may be_that the writer was very famous inthe 4thcentury.Keys: 1). assume 2). suppose 3). presumedn.词性变化（旨在提供语法填空所

9、需材料）1. alternative n.c替换物adj.选择性的，二中择一的alter nativelyadv.作为选择，二者择一2. accuracy n.u精确性，正确度accurate adj.正确的，精确的in accurate adj.不准确的accurately adv.正确地，精 确地inaccurately adv.不准确地3. assume vt.假定；设想；assumption n.假定，设想，assumed adj.假定的，假装采用；承担假装，就职的，装的4. an alysis n .c分析，分解an alyse(a nalyze) vt.分析，分解an alytic

10、al adj.分析的，解析的5. sig ni fica nee n.意义，含义；重要性，重大sig ni fica nt adj.相当数量的；意义重大的sig ni fica ntly adv.意义深远地，重大地6. divisio n n.分（开，配，担；歧，裂）；除（法）；部 门divide vt.分（开）；vi.分开7. skill n.c,u技能，技巧，熟练，巧妙skillful adj.灵巧的，熟练的，制作精巧的skillfully adv.巧妙地，技术好地【练习】用括号内所提供词的适当形式或介词填空。1). The way was blocked, so we went by a

11、n(alter natively) road.2). The desig n is slightly(accurate), so we must make some cha nges.3). The boss is worried about the(accurate) of the statistics.4).Its impossible to predict the weather(accurate).5). A lot of people make the(assume) that poverty only exists in theThird World.6). The(analyse

12、) of thesamples on the murder spot showed some valuableclues to the police the address.7). Stude nts n eed to possess certa in basic(skillful) by the time theyfinish schoo1.8). He was valued for his skill(介词)raising money for the company.9). The discovery of the new drug is of great(sig ni fica nt)

13、to peoplesufferi ng from heart problems.10). Sometimes there is no simple(divide) betwee ngood and evil.Keys: 1). alter native 2). i naccurate 3). accuracy 4). accurately5).assumpti on6). an alysis 7). skills8). i n9). sig nificance 10).divisio n川.重点词汇(旨在提供词汇综合运用所需材料)1. i nterrupt vt.&vi.阻断，中断；打

14、岔；插嘴in terruptio n n.中断，打断典例1) . Traffic in the city was in terrupted by a sno wstorm.市内交通被暴风雪所阻断。2) . It is rude to in terrupt.打断别人的话，是不礼貌的。重点用法in terrupt (sb/sth) (with sth)打断(某人)讲话；打岔；打扰练习用interrupt的正确形式填空。1) . Electricity_(in terrupt) in the course of work.2) . Lets go somewhere where we can tal

15、k without_ (interrupt).Keys: 1). was in terrupted 2). i nterrupti on2. applaud vt.鼓掌，称赞，赞成applause n.鼓掌欢迎，欢呼典例1). Everyone即plauded whe n the play en ded.演出结束时，大家都热烈鼓掌。2). I applaud your decisi on.我赞成你的决疋。重点用法applaud the decisi on赞成某applaud sb. for sth个决定因某事而赞扬某人3. accelerate vt.&vi.力口速，促进acceler

16、ati on n.加速度典例1) . We must take measures to accelerate the rate of econo mic growth.我们必须采取措施，加速经济增长。2) . The car accelerated as it overtook me.那辆汽车一加速就超越了我。练习用accelerate或其同根词的适当形式填空。1) . The driver stepped on the gas and_the car.2) . The_of train service will bring us great convenience.3) . The bad

17、weather_ our departure.Keys: 1). accelerated 2). accelerati on 3). accelerated4. arrest vt.逮捕，拘留，吸引(注意)n.c逮捕典例1) . The crim inal was arrested yesterday.2) . What she did arrested my atte nti on.重点用法be arrested for sth.因某事而被捕un der arrest被捕；被拘留IV.重点词组(旨在提供综合运用所需材料)1. regardless of不管；不顾典例1) . Ill take

18、 the job regardless of the pay.不管报酬多少我都要这份工作。2) . He says what he thinks, regardless of other peoples feelings.他怎么想就怎么说，不考虑别人的情绪。罪犯昨天被捕了。她所做的吸引了我的注意力。arrest ones attention吸引某人的注意2. fed up with受够了，厌烦典例1) . Im fed up with wait ing for her to teleph one.2) . What s the matter? You look pretty fed up.我等

19、她的电话都等得不耐烦了。怎麽啦？你显得那麽不高兴。短语归纳feed短语：feed sb/sth on sth给（人或动物）食物；喂；饲养feed on食feed sth to sb/sth给（人或动物）某物作为食物练习根据句子的要求在括号里填入适当的介词。（动物）以为主1). Several childre n were feedi ng bread_the ducks.2). What do you feed your dog_?3). Cows feed_grass.4). Im fed up_ the same breakfast every morning.Keys: 1). to 2

20、). on 3). on 4). with3. look ahead向前看；为将来谋划典例Have you looked ahead to what you五年後你要做些什麽？ll be doing in five yearstime?你是否想过短语归纳look短语：look back向后看；回顾look up查找；形势好转；看望 细查阅look forward to sth./d oing sth.look out留神；注意look up tosb.尊敬 某人盼望look on旁观；看作look into调查lookthrough仔look over快速浏览，复习look dow n (on

21、/upon sth.)4. date back to. = date from.追溯到.，从.时候开始就有了典例The church dates back to the 13th cen tury.这座教堂从十三世纪开始就有了。练习根据句子的要求在括号里填入短语或所给词的适当形式。1) . The custom_ hun dreds of years.2) . Our friendship_ the late 70s.3) . This is a law_(date) from the 17th cen tury.Keys: 1). dates back 2). dates back to 3

22、). dati ngV.重点句子(旨在提供句子结构等所需材料)1. We have bee n excavati ng layers of ash almost six metres thick, which suggeststhat they might have kept the fire burning all win ter.我们一直在挖掘一层层的积灰，几乎有六米厚，这说明他们可能整个冬季都在烧火。解释“have been excavating”是现在完成进行时，表示从过去开始一直延续到现在，或 将继续延续至将来。女口：We have been working on this project for over a month now.至U目前为止，我们一直在处理那个项目，已经花了一个多月时间了。注意：区别现在完成时和现在完成进行时的区别。一般来说现在完成时表示已经完成，而现在完成进行时表示还没完成还要延续下去或者刚刚完成。试比较：They have built a house.(完成) / They have been building a house.(尚未完成)2. Our evide n