高中英语 unit4 period3 language points学案 北师大版必修2

Period 3Language Points1Compared to 20 years ago how do you think technology will change our life?_2Do you feel pessimistic or optimistic about the future of the Internet? Why? _1In the last thirty years, the Internet has_grown rapidly.三十年来，因特网迅猛地发展着。归纳时间状语 in the last/past thirty years，通常与现在完成时连用。另外，recently, lately, so far，until now，up to now，by now, (ever) since等也是现在完成时的标志性时间状语。运用(1)Up to now, the program _ thousands of children who would otherwise have died.Awould save BsavesChad saved Dhas saved(2)Progress _ so far very good and we are sure that the work will be finished on time.Awas Bhad beenChas been Dwill be(3)Her sister left home in 1998，and _ since.Ahad not been heard ofBhas not been heard ofChad not heard ofDhas not heard of2In the future, terrorists may “attack”the worlds computers, cause chaos, and make planes and trains crash.将来，网络恐怖分子可能会“攻击”全世界的计算机，制造混乱，引发飞机和火车事故。归纳attack vt. & n攻击，袭击；抨击，责难；(疾病)侵袭attacker n袭击者；攻击者attack sb.with sth.用某物袭击某人attack sb.for sth.因某事抨击某人carry out/make an attack on.对发起攻击be/come under attack from.遭到的攻击，抨击运用(1)He was arrested for _ his brother _ a knife.他因用刀攻击他哥哥而被捕。(2)Newspapers _ the President _ failing to cut taxes.报纸抨击总统未能成功减税。(3)The government _ from all sides _ cutting education spending.政府因为削减教育开支而受到各方面的强烈批评。3Already, users can buy books, find out about holiday offers,_book tickets, and get all sorts of information from the Internet.现在，用户已经可以从网上购书，查找节日特惠，订票，并可以从网上获取各种各样的信息。归纳offer vt.提出，提供；出价，开价；n.主动提议，建议(of sth./to do sth.)；出价，报价(for sth.)；(短期的)削价，特价offeraccept/take an offer接受提议，建议turn down/decline/reject an offer拒绝提议make sb.an offer for/on sth.向某人开的价小贴士offer后面不可接that从句，但可以引出直接引语。 “Ill do the cooking，” he offered.他主动提议：“我来做饭。”运用(1)He _ a better position.他向我提供了一个更好的职位。(2)Someone _ the bike.有人向我出价300美元买这辆自行车。(3)The kids _ the dishes.孩子们主动要求洗盘子。(4)If you like I can do some shopping for you.Thats a very kind _.Aoffer BserviceCpoint Dsuggestion(5)The boy _ his fathers offer of help, for he was trying to be independent.Atook BacceptedCturned down Dturned away4. Some experts see our future in virtual realitythe use of computers with sounds and pictures that make you feel as_if you are in a real situation.有些专家看到了我们在虚拟现实中的未来是计算机通过声音和图像模拟现实，以使人感到仿佛置身于一个真实的空间。归纳as ifas though好像，仿佛(1)在look, seem等系动词后引导表语从句，还可引导方式状语从句，从句常用虚拟语气，表示与事实相反。当表示与现在事实相反的情况时，从句用一般过去时；当表示与过去事实相反的情况时，从句用过去完成时。(2)用于省略句中，构成“as if 名词/不定式/形容词(短语)/介词短语/分词”结构。小贴士 注意as if/though和even if/though的区别，后者表示“即使，尽管”，引导让步状语从句。运用 (1)The young man with long hair walks as if he _ a girl.留长发的那个小伙子走起路来就像个小姑娘。(2)The injured man acted as if nothing _.那个受伤的男子行动起来仿佛什么事也没有一样。(3)The man we followed suddenly stopped and looked as if _ whether he was going in the right direction.Aseeing Bhaving seenCto have seen Dto see(4)_ you explained the reason to him, he would not believe you. A. Even if B. As ifC. While D. AsPeriod 3Language Points课前准备区1We have more cars and computers which are more and more popular.We can go shopping and book tickets online. We neednt carry cash and use credit cards. Instead of going to the bank we can use a computer and a telephone to pay for bills.2Im optimistic about the future of the Internet, because the Net has become a part of our life. We do many things on it, such as shopping, study, chat，etc.课堂活动区1(1)D本题考查时态。up to now表示“直到现在”，句中谓语动词一般用现在完成时。(2)C本题考查时态。句意为：到目前为止，一切进展良好，我们确信这工作能够按时完成。so far (by now)是现在完成时的标志性时间状语，故C项正确。(3)B句意为：他妹妹自1998年离家，自此杳无音信。since 此处是副词，表示“从那以来”，通常与现在完成时连用。同时her sister与hear of是动宾关系，应用被动语态。故选B项。2(1)attacking；with(2)attacked；for(3)has come under attack；for3(1)offered me(2)offered me $300 for(3)offered to do(4)A本题考查名词辨析。对方主动提供帮助，应是offer。而service服务(一般是指有偿服务)，不符合句意。(5)C根据后一分句可知，这位小男孩尽量保持自立、自主的生活，所以他拒绝了父亲主动提出的帮助。turn down 拒绝，符合题意。4. (