必修三UNIT4单词讲解课件

1、1. unlike prep. 与不同；不像；eg.Unlike her younger brother, she is very diligent. 和她弟弟不同的是，她很刻苦。拓展：(1)unlikely adj. 不大可能的；未必会发生的； Its unlikely that 的可能性不大(2)likely adj. 可能的 adv.很可能 Its likely that 可能(3) sb./sth. be likely to do sth. 有可能做某事eg.这位影星可能来The movie star _ _ _ _.is likely to come 2 . harmful adj.

2、 有害的;造成伤害的； Many people are aware of the harmful effects of smoking. 很多人都意识到了吸烟的危害。【联想拓展】（1）be harmful to 对有害 （2） harm n.&v. 损害，伤害 do harm to sb.= do sb.harm = harm sb. 对某人有害；（3）There is no harm in doing sth. 做某事没有害处eg. 在学习上取得进步没有任何害处。 There is no harm in making progress on study. (4) 无害的；不致伤的； harm

3、less【即学即练】吸烟有害健康。 Smoking _ _ _ your health. is harmful todoes harm to3.exist vi. 存在；生存 (无被动,无进行) Man cannot exist without air.（1） exist on 靠生活、生存eg.他们靠微薄的收入生存是不可能的。 Its impossible for them to exist on a small income.(2) there exists/esisted 某地有eg. 在我们公司门口有两个巨大的石狮子。 There exists 2 huge stone lions a

4、t our company gate.拓展： （3） existence n. 存在；生活; come into existence 产生；成立；开始存在；eg.Do you know when the English wordtuhao_ _ _come into existence4.puzzle vt. &vi. (使)迷惑；(使)为难 n.谜；难题 Her reply puzzled me. 她的回答把我弄糊涂了。 (2) puzzle about/over . 对感到迷惑；苦苦思索； 她几个星期也琢磨不透他那封奇怪的来信。 Shes been _ _ his strange lett

5、er for weeks. eg.Their reason for doing it is still a puzzle to me.他们为什么要做此事我仍莫名其妙。(3) beapuzzletosb对某人来说是个谜【联想拓展】（4）puzzled adj.迷惑不解的；困惑的 be puzzled about 对迷惑不解 puzzling adj.令人费解的【即学即练】She felt _ about her future. A.puzzle B.puzzling C.puzzled D.puzzles（1）puzzle sb. 使某人困惑puzzling overC 5in time 及时；

6、终于；迟早 归纳拓展：on time at the same timeat timesat one timeat a timeat no timefrom time to timeahead of time take ones timein no timeall the time准时同时有时；偶尔；一度；曾经有一个时期；一次；每次绝不；在任何时候都不（放句首，句子用半倒装） 不时地，间或；提前；提早别着急；慢慢来立刻，马上(at once/immediately)一直；始终 Will we be in time for the six oclock train?我们来得及赶上六点钟的那趟火车吗

7、？If you keep on working hard, youll succeed in time.如果你坚持努力工作，你迟早会成功的。The boss ordered us to finish our task ahead of time.老板命令我们提前完成任务。Take your time packing, for we still have one and a half hour.慢慢整理行李，因为我们还有一个半小时。我们决不能向敌人屈服。At no time can we give in to the enermy.6.in ones turn 轮到某人； eg. In my t

8、urn, I told them a joke.常用结构：(1)in turn依次；轮流；转而；反过来；(2)take turns (to do sth./doing sth.)轮流（做某事） (3)Its ones turn to do sth.轮到某人做某事【即学即练】1.让我们轮流来做这项实验。 Lets do this experiment _ _ .2.你的态度影响别人，它又将会反过来影响你。 Your attitude affects others which _ _ affects you.3.今天该我洗盘子洗碗了。 Its my turn _ _ _ today.in turn

9、in turnto wash up7.prevent.from 阻止；制止eg. His back injury may prevent him from playing in tomorrows game. 他背部的伤可能使他参加不了明天的比赛。用法点拨： prevent.(from)= stop.(from) = keep.from 阻止做eg. 应该派一些警察去阻止他们砍树。Some policeman should be sent to _ them_ the trees. stop cuting downprevent cuting downkeep from cuting down

10、1. crash1）vt./vi. 碰撞，坠落 crash into. 冲入，撞入2） n.相撞（事故），飞机的（坠落），坠落声 a plane/car crash 飞机失事/汽车相撞事故 with a crash 随着撞击声eg:The motorcycle_ the fence.eg:An airliner_west of Dever last night.eg:The glass fell to the floor_.Language points crashed intocrashedwith a crash2. pull vt. 拉，拖 n. 拉力，牵引力 pull 拉，拖 push

11、 推相关短语： pull down 拆毁（建筑物） pull away 开始驶离，开走 pull in 火车进站，驶向路边停靠 pull on 匆忙穿上（衣服） pull of 脱掉 pull through 度过危机，恢复健康 3. cheer v. 为.欢呼，喝彩，鼓舞 cheer up 感到高兴，感到振奋 cheer sb. on 为某人加油，喝彩 cheer the victory 为胜利欢呼 Cheers！ 干杯 cheerful adj. 快乐的，高兴的eg1:我写那首歌只是为了让自己高兴。 I write this song just to cheer myself. eg2:

12、If Andrew sees these great reviews, hell_.eg3: The gril_the runners_.cheer upcheeredon4. break out (战争，火灾，疾病，争吵）突然发生， 爆发相关短语：break away （from）摆脱，脱离 break down 机器故障，身体垮掉，汽车抛锚， 谈判失败 break in 闯入，打断 break into 破门而入，非法闯入 break ones word/ promise 食言，失言 break up 关系破裂，解散eg1：A fire_in his house last night.eg

13、2: When the war _,the old man wasstill living in Libya.eg3:The gril_to say the guests had arrived.eg3: Their car_.(他们的车出故障了)break outbreak outbreak inbreak down5. watch out 密切注视，当心，提防 相关短语：watch over 照看，看守 keep a watch 守望，注视“当心，注意” watch out look out take care be careful （注：watch out和look out后必须加“fo

14、r”才能跟宾语！） eg：The American government warned itscitizens_ for terrorists.watch out【即学即练】单项填空She felt _ about her future. A.puzzle B.puzzling C.puzzled D.puzzles解析:选C。句意为：她对她的将来感到迷惑。puzzled（人）迷惑的，迷惘的；puzzling（物）令人迷惑的。5.pull n.&vt.拉(力）；拖；牵引力You push and Ill pull. 你来推，我来拉。 I felt a pull at my sleeve and

15、 turned round.我觉得有人扯我的袖子，便转过身来。反义词:push【速记名片】常用结构：pull (sb.) back（使某人）退却；撤回（某人）pull sb. down（指疾病）使某人虚弱pull sth. down毁坏, 拆毁（如旧建筑物）pull together:齐心协力单项填空1.So long as we _, theres no mountain top we cant conquer. A.pull out B.pull in C.pull together D.pull back解析：选C。考查pull短语的辨析。句意为：只要我们团结起来，就没有我们征服不了的山

16、峰。由句意可知，选C。6.cheer vt. & vi. (使)高兴、振奋；(对)欢呼【联想拓展】cheerful adj.高兴的cheerless adj.不高兴的 He was greatly cheered by the news. 他听到这个消息非常高兴。The crowd cheered loudly as the Queen appeared.女王出现时群众高声欢呼。常用结构:cheer sb.on为某人加油cheer (sb.) up（使某人）更高兴或更快活cheer for为欢呼，喝彩；给加油【即学即练】完成句子赛跑进入最后一圈时，观众为运动员加油鼓劲。 The crowd _

17、 _ _ _ as they started the last lap. 想到再次见到她，他就高兴起来。 He _ _ at the thought of seeing her again. 咱们去看足球比赛，为我们的校队呐喊助威。 Lets go to the football game and _ _ our school team.答案：cheered the runners on cheered up cheer for【即学即练】完成句子1.让我们轮流来做这项实验。 Lets do this experiment _ _ .2.你的态度影响别人，它又将会反过来影响你。 Your at

18、titude affects others which _ _ affects you.3.今天该我洗盘子洗碗了。 Its my turn _ _ _ today.答案：1.in turn 2.in turn 3.to wash up单项填空He gets cheerful and depressed _. A.by turns B.take turns C.in turn D.in his turn解析:选A。考查短语的辨析。此句的句意为：他的情绪高一阵低一阵。故选A。8.prevent.from 阻止；制止eg. His back injury may prevent him from p

19、laying in tomorrows game. 他背部的伤可能使他参加不了明天的比赛。用法点拨： prevent.(from)= stop.(from) = keep.from 阻止做eg. 应该派一些警察去阻止他们砍树。Some policeman should be sent to _ them_ the trees. stop cuting downprevent cuting downkeep from cuting down单项填空1.Some policeman should be sent to _ them _ the trees. A.prevent; to cut do

20、wnB.stop; cutting downC.keep; to cut downD.keep; cutting down B9.break out (灾难、战争等) 突发；爆发Trouble may break out at any moment. 灾难在任何时候都可能突然发生。When did the war break out? 战争是什么时候爆发的？温馨提示：break out指战争、火灾等的爆发或疾病的突发，无被动语态。常用结构：break down 出故障；（计划、谈判等）失败；（身体、精神等）垮掉break in 闯入；插话break into 强行进入；突然起来break of

21、f 折断；突然中止；断绝；结束break through 突破，强行穿过break up 解散；打碎；（学校）期终放假【即学即练】完成句子他一句话只说了一半就停住了。 He _ _ in the middle of a sentence. 你们什么时候放圣诞节假? When do you _ _ for Christmas? 双方谈判已经破裂。 Negotiations between the two sides have _ _ .上星期有人闯入他的房屋。 His house was _ _ last week. 答案：broke off break up broken downbroken

22、 intoHehadtopausefromtimetotimetowipethesweatfromhisforehead,becausetheair-conditioningsystem_.(2012陕西)A.brokeinB.brokeupC.brokeoutD.brokedown10.watch out (for) 注意；当心watch it 当心，小心watch over 照看；看守keep a close watch/eye on 密切注视即学即练(1) _ _！ There is a car coming!当心！有车来了！(2)_ _ _ cars while crossing th

23、e road.过马路时要当心车辆。Watch out; Watch out for11. now that “既然，由于”，连词短语，用来引导原因状语从句，口语中that常可省略。Now that(since)the kids have left home，weve got a lot of extra space.既然孩子们都离开家了，我们住着就宽敞了。 单项填空1.It was reported that a plane crash happened last night and most of the passengers were badly _ and some 10 died. A

24、.damaged B.injured C.destroyed D.harmed解析：选B。考查同义词的辨析。injure强调在意外事故中 “受伤”。2.The boiler from excessive pressure of steam _ . A.exploded B.burst C.explode D.erupt 解析：选A。考查同义词的辨析。explode强调(火药、炸药或蒸气压力过高的锅炉)爆炸，炸裂，突然破裂。由句意“蒸气压力过高的锅炉突然破裂了”用一般过去时最合适，因此答案选A。3.He exists _ bread and water. A.on B.in C.by D.wit

25、h解析：选A。考查短语搭配。exist on靠活下去(或生存);exist in在中存在(或生存); exist by在(某种思想、品质等)中找到生活的力量;exist with与共存。由句意“他靠面包和水度日”可知答案。4. The villagers were often in _ clashes with each other in those years before the agreement was reached. A.interesting B.peaceful C.violent D.spiritual解析：选C。句意为：村民们在协议达成之前彼此之间经常发生暴力冲突。所谓的冲

26、突不应是“有趣的”，也不会是“平安的”“和平的”，既然是彼此之间发生的事情，“精神冲突”亦不合适，只有“暴力的冲突”才符合句意，故选C。5.Freezing winter is harmful _ orange trees. A.for B.to C.of D.at解析：选B。考查固定短语。句意为：寒冬对橘子树有害。be harmful to. 对有害。6.She started as an office junior, and _ became the director the whole company. A.in surprise B.in return C.in turn D.in t

27、ime 解析：选D。考查短语的区别。in surprise 吃惊地；in return作为回报；in turn轮流，依次；in time终于，一段时间后。由句意“她起初只是一名办公室职员，最终成了整个公司的董事。”可知应选D。7.Everything went well according _ plan. A.to B.with C.for D.as解析：选A。句意为：一切依计划进展顺利。according to为固定短语，意为“根据，按照”。8.The boy lying under the tree lied to his friends that his cock _ eggs. A.lied B.laid C.lay D.lain解析：选B。考查lie (lied,lied)说谎；lie (lay,lain)躺，平卧和lay(laid,laid)放置；下蛋等几个词的区别。句意为：躺在树下的那个男孩向他的朋友撒谎说他的公鸡下蛋了。9.There is no harm _. A.on try B.i