人教版高二英语选修8-unit2-language-points-(共33张PPT)课件.ppt
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1、Language points1. This happens in plants when gardeners take when twins identical in sex and 1) “when gardeners take cuttings from growing plants to make new ones, when twins identical in是两个时间状语从句。when 引导的时间状语从句中从句的动作可以与主句的动作同时发生,也可以先于主句的动作。Dont be afraid of asking for help _ it is needed. (03, 全国)A
2、. unless B. since C. although D. whenD 2) happen vi. occur by chance; take place (偶然地)发生; 出现 happen to do happen to sb. It happened that happening n. 事件; 偶然发生的事 (常用复数)辨析: happen, occur, take place与come about四词都有“发生”之意, 但有区别。happen 是一般用语, 词义较广, 强调事情 发生的偶然性;occur 用法较正式, 既可以指自然发生, 也 可以指有意安排。碰巧(某人)发生什么事
3、了碰巧1) When did the explosion _?2) Important elections _ this fall.3) The concert will _ next Sunday.4) How did the quarrel _?occurtake placecome abouthappenUse the above words to fill in the blanks.take place 一般指有计划一般指有计划, 按事先安排的按事先安排的 进行的含义。进行的含义。come about 往往注重事情发生的原因往往注重事情发生的原因, 常常 与与how 连用。连用。以上
4、四组词均为不及物动词以上四组词均为不及物动词, 无被动语态。无被动语态。2. straightforward adj. 简单的, 易懂的, 坦诚的, 坦率的straightforwardly adv. 率直地, 坦诚地straightforwardness n. 率直Jack is rough, but always straightforward. Installing the program is relatively straightforward.She admired his straightforwardness.3. undertake vt. (undertook; under
5、taken) 着手做着手做, 从事从事, 进行进行; 担任担任, 承担承担, 答应答应, 同意。同意。The procedure is difficult to undertake, of course. 当然当然, 这个过程很难实施。这个过程很难实施。The scientist undertakes the experiment.科学家从事这项实验。科学家从事这项实验。I can undertake the responsibility for the changes.我愿意承担这些变革的责任。我愿意承担这些变革的责任。完成下列句子。1) The lawyer _ a new case. 那
6、个律师接了一个新的案子。2) He will _ _ _ next month (去旅行).3) He _ _ _ _. (承担一项新任务)undertookundertook a new taskundertake a jorney4. pay off (事业、计划等事业、计划等) 成功成功; 付清薪水并付清薪水并 解雇解雇; 偿还偿还(债务等债务等)。 At last the determination and patience of scientists paid off 最终科学家们的决心和耐心得到了回报最终科学家们的决心和耐心得到了回报 He paid off the crew of
7、 the ship. 他付清全体船员的工资并将他们解雇。他付清全体船员的工资并将他们解雇。 In the end he paid off all his debts. 最终他还清了所有的债务。最终他还清了所有的债务。 pay back 报答报答; 报复报复用介词back, off, to,填空:1) -Your effort is sure to pay_. - Thank you for your encouragement.2) The supermarket _ which he had ever paid a visit, was burnt to the ground.3) How
8、can I pay you _ for all your kindness?4) Well, after these years, weve at last paid _ all our debts. offtobackoff1) contain v. 包含包含, 含有含有2) needed to produce a new sheep 为过去分词为过去分词 短语作后置定语短语作后置定语, 修饰其前面的名词修饰其前面的名词 genes, 构成动宾搭配关系。构成动宾搭配关系。5. The nucleus of this cell contains all the genes needed to
9、produce a new sheep. 这个细胞的细胞核含有生产一只新的绵羊的 必需的基因。辨析: contain 与 include contain “包含, 含有”, 侧重于包含的内容或 成分, “里面装有”; include “包括”, 侧重范围或整体。e.g. 1) Whisky _ a large percentage of alcohol. 2) The book _ forty maps, _ three of Great Britain.containscontainsincluding6. The nucleus from sheep B and the egg cell
10、from sheep A are joined using electricity. 从绵羊B中取出的细胞核与从绵羊A中取出 的卵细胞用电流使之结合。1) using electricity 为现在分词短语作方式状语。2) 联手, 携手 参加活动 和某人一起做事 参军, 连起来join handsjoin in sth. / doing sth join sb. in sth.join uptake part in 指参加某项活动, 并以积极的态度 在所参加的活动中起作用;join “加入”团体或组织;join in 指参加活动和游戏;join sb. in sth. 和某人一起做某事;att
11、end 参加会议 (听演讲、听音乐、参加婚礼)辨析: take part in, join, join in 与 attend7. The fact that she seemed to develop normally was very encouraging. 多莉看来是在正常地成长着, 这很令人鼓舞。“that she seemed to develop normally”是同位语从句。同位语从句可由when/ where/ how/ why/that/ whether等词引导。先行词多半是idea/ fact/ news/hope/ belief/ thought/ doubt/que
12、stion等。同位语从句一般放在抽象名词之后, 用以说明抽象名词的具体内容, 有时为了保持句子的平衡, 同位语从句还可以放在动词的后面。如: Soon word came that we won. 8. Then came the disturbing news that Dolly had become seriously ill. 然后传来了多莉病重的坏消息。本句中, 副词then放于句首, 主语是名词“news”, “that Dolly had become seriously ill”是同位语从句, 句子用了倒装语序。In the dark forests _, some large
13、 enough to hold several English towns. (05, 辽宁)A. stand many lakes B. lie many lakesC. many lakes lie D. many lakes standB disturbing adj. The news from the front is very disturbing. 来自前线的消息令人极为不安。来自前线的消息令人极为不安。 disturb vt. 扰乱扰乱, 使不安使不安, 弄乱弄乱; disturbed adj. 被扰乱的被扰乱的, 动乱的动乱的, 不安的;不安的; disturbing adj
14、. 令人不安的。令人不安的。 特别提示特别提示: 现在分词表示现在分词表示: 令人怎么样令人怎么样 过去分词表示过去分词表示: 被使得怎么样被使得怎么样, 感到怎么样感到怎么样如: an interesting story 令人感兴趣的故事 an interested look 感到兴趣的表情 surprised people (感到)惊奇的人们用disturb, disturbing, disturbed填空。1) Im very _ about Alice.2) Dont _ the papers on my desk.3) This country is in a _ state.4)
15、What _ news it is!5) A light wind _ the surface of the water. disturbeddisturbdisturbingdisturbingdisturbed9. cast down 使沮丧使沮丧; 毁掉毁掉 (常用于被动语态或常用于被动语态或作表语作表语)Cloning Scientists were cast down to find that Dollys illness were more appropriate to a much older animal. 克隆科学家克隆科学家沮丧地沮丧地发现多莉的病发现多莉的病更容易在年老的
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