人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists教案配套课件ppt

这是一份人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists教案配套课件ppt，共60页。PPT课件主要包含了课前自主预习，猜词意，课堂新知讲练，◇词汇拓讲，用法详解，◇句式解读，归纳拓展，突 破 语 法，□观察领悟，□表语从句等内容，欢迎下载使用。
A．细胞；小房间；单间牢房　B．框架；结构　　　　C．蛋白质　D．病毒E．思想；思维；见解
1．I have t d sme thinking befre making a decisin. (　　)2．Arund 15% f ur diet is cmpsed f prtein. (　　)3．The cancer cells may invade ther parts f the bdy.(　　)4．This sftware is designed t scan all new files fr viruses. (　　)5．The reprt prvides a framewrk fr further research. (　　)【答案】1．E　2．C　3．A　4．D　5．B　
Ⅱ．猜单词拼写　1．finding n. →__________　vt. 发现；找回；找到　(参考：suffering→suffer)　2．initial adj. →__________　adv. 开始；最初；起初　(参考：careful→carefully)　【答案】1．find　2．initially　
Ⅲ．预备语法(表语从句)　观察下列句子，并根据句意填上适当的词　1．One thery was __________ bad air caused the disease. 2．If I’m a bit sleepy, it’s __________ I was up all night. 【答案】1．that　2．because　
3．That task is t hard fr us, that is __________ I bject t the plan. 4．That is __________ I will tell yu abut the meeting. 5．The truth was __________ the water frm the Brad Street pump had been infected by waste. 【答案】3．why　4．what　5．that　
1．make sense 讲得通，有意义；明智；理解　(P4)Targeting the hst rather than the (infectin) was a bit nn-traditinal but made sense because it was tricky t target the virus. 【翻译】以宿主为目标而不是以感染为目标有点非传统，但也说得通，因为以病毒为目标是很棘手的。
(1)make sense f 理解；明白　make n sense 没道理；没意义　(2)in a sense 在某一方面；就某种意义来说　in n sense 决不(位于句首时用部分倒装)　(3)There is n/little sense in ding sth. 做某事没道理/没意义。
Planning s far ahead makes n sense—s many things will have changed by next year. 提前这么久做计划没有意义，许多事情到第二年可能已经变了。
【针对练习】　完成句子　(1)Can yu make sense ________ what this American is saying?你听得懂这个美国人在说些什么吗?【答案】(1)f　
(2)It________________ t wrk ut the plan befre it is t late. 在还不算太晚之前来制订这个计划是明智的。(3)___________________ abut the future. 为将来的事情担忧是毫无意义的。【答案】(2)makes sense　(3)There’s n sense in wrrying　
2．advance n. 发展；进步 vt. 促进；前进；提前　(P4)Thugh these scientists have made (substantial) advances in their research, further (prf) is needed t make sure such drugs are nt s (severe) that they harm the bdy. 【翻译】尽管这些科学家在他们的研究中取得了重大进展，但还需要进一步的证据来确保这些药物不会严重到伤害身体的地步。
make great advances in …　在……方面取得很大的进步　in advance 预先；提前　advanced adj. 高级的；先进的　be advanced t … 被选拔为……　
China has made great advances in ecnmy in the past frty years. 在过去的四十年，中国在经济方面取得了巨大进步。
【语境串记】　With the help f the advanced technlgy, we can cmplete the task in advance. 借助先进的技术，我们可以提前完成任务。
【针对练习】　单句语法填空　(1)The factry brught in the mst ________(advance) equipment. (2)He was advanced __________ his present jb tw years ag. 【答案】(1)advanced　(2)t　
完成句子　(3)Mary ___________________ thanks t the help f Mr Brwn. 幸亏有了布朗先生的帮助，玛丽在学业上取得了很大进步。【答案】(3)has made great advances in her study　
3．be determined t d sth. 决心做某事　(P5)What was Snw determined t find ut during the 1854 utbreak f chlera in Lndn?【翻译】在1854年伦敦暴发霍乱时，斯诺决心找出什么?
(1)determine vt. 决定；确定；下定决心　determine sb. t d sth. 使某人决定做某事　determine t d sth. 决心做某事　determine n/upn 决定　(2)determined adj. 坚决的；有决心的　(3)determinatin n. 决心；果断　
He determined t rescue his tw cuntrymen. 他决心要援救他的两位同胞。
【针对练习】　单句语法填空　(1)My ten-year-ld sn was grwing and changing right befre my eyes，int this ________(determine) human being with a passin and a missin. (2)We shuld vercme ur weaknesses and fears with curage and ________________ (determine). 【答案】(1)determined　(2)determinatin　
【用法详解】　一句多译　(3)他想到了妈妈的期望，决定不撒谎。He thught f his mther’s hpe，and _________________. ＝He thught f his mther’s hpe，and________________. ＝He thught f his mther’s hpe，and _____________. 【答案】(3)was determined that he wuld nt tell a lie；(was) determined nt t tell a lie；determined n/upn nt telling a lie　
4．get dwn t着手做；认真做 (P5)This was when yu shuld have calmed dwn and gt dwn t ding sme slid wrk. 【翻译】这时你应该冷静下来，做一些扎实的工作。
get dwn t短语中的t是介词，其后面接名词或动名词作宾语。get acrss (t) 把……表达清楚；使理解　get thrugh 通过；完成　get ver 克服；恢复过来　
get in 插话；收获　get arund 传播；流传　get away 逃离；摆脱　get alng with 与……和睦相处；取得进展　
She talks s much that yu can’t get a wrd in. 她说得太多了，你一句话也插不进去。I dn’t think that yur lecture gt acrss t the audience, fr they appeared quite puzzled. 我认为听众没有理解你的演讲，因为他们显得很困惑。
【针对练习】　单句语法填空　(1)They have just cme here t get dwn t ________(repair) the damaged statues. (2)We need t get dwn ________ the serius business f wrking ut csts. 【答案】(1)repairing　(2)t　
用get的短语填空　(3)He can’t ____________ his clleagues, s he feels lnely. (4)Let’s start. There’s a lt f wrk t __________. (5)Hw can the peple in the underdevelped cuntries ______________ frm pverty?【答案】(3)get alng with　(4)get thrugh　(5)get away　
1．(P4)Many scientists (subscribe t) the view that it is human activity that has caused glbal warming. 【翻译】许多科学家认为是人类活动造成了全球变暖。【句式剖析】　本句是一个强调句型，强调的是主语human activity; 正常的语序为：human activity has caused glbal warming。
(1)强调句型强调的句子成分通常为主语、宾语、时间状语、地点状语等，一般不强调谓语动词、表语、让步状语等。当强调的是主语时，其谓语动词应和被强调的人和物保持人称、数的一致。强调谓语动词时，用“d/des/did＋动词原形”。
(2)强调句型基本结构：　陈述句式：It is/was＋被强调部分＋that/wh(指人)＋句子其余部分。一般疑问句式：Is/Was it＋被强调部分＋that/wh＋句子其余部分?特殊疑问句式：特殊疑问词＋is/was it＋that＋句子其余部分?
(3)含有“nt…until… ”的句式：It is/was nt until＋被强调部分＋that＋句子其余部分。(4)强调句型的判断：将强调句结构中的It is/was…that/ wh… 去掉，如果句子所剩下的部分不缺少任何成分，仍是一个完整的句子，这个句子就是强调句，否则就是其他从句。
What was it that prevented him frm cming n time?是什么使得他没按时来?It was nt until I returned hme that my mther went t bed. 直到我回家，我妈妈才上床睡觉。
【针对练习】　按要求进行句型转换　(1)My mther always gives me encuragement whenever I meet with difficulties. →________________________ (强调句子主语)　【答案】It is my mther that/wh always gives me encuragement whenever I meet with difficulties.
(2)It was at the cinema that I met an ld friend f mine. →____________________ (改为一般疑问句)　【答案】Was it at the cinema that yu met an ld friend f yurs?(3)It was Tm that brke the windw. →____________________ (改为特殊疑问句)　【答案】Wh was it that brke the windw?
2．(P4)Cld-causing virus are nt nly f (multiple) kinds, they als transfrm rapidly, meaning they can quickly develp resistance t medicine. 【翻译】引起感冒的病毒不仅种类繁多，而且转化迅速，这意味着它们可以迅速产生抗药性。【句式剖析】　“nt nly…but als… ”是连词词组，用来连接两个并列的句子成分，but或als有时可以省略。
(1)“nt nly…but (als)… ”通常连接两个并列成分，如主语、谓语、宾语等，还可连接两个句子。(2)“nt nly…but (als)… ”连接的两个并列成分作主语时，谓语动词要和but (als)后的成分在人称和数上保持一致。有类似用法的结构还有“nt…but…”“either…r…” “neither… nr…”等。
(3)“nt nly…but (als)… ”连接两个并列分句，且nt nly位于句首时，nt nly所在的分句要部分倒装， 但but (als)后的句子不倒装。
He nt nly explained t us why he was late, but als aplgized t us. 他不仅向我们解释了他迟到的原因，还向我们道歉了。(连接两个谓语)　
Nt nly I but als he lks dwn upn thse wh always rely n thers. 不仅我还有他都瞧不起那些总是依靠别人的人。The architect as well as sme experts is t attend the cnference tmrrw. 那位建筑师和一些专家明天要参加会议。
【针对练习】　单句语法填空　(1)Nt nly I but als he __________(attach) the imprtance t recycling garbage. (2)He nt nly exercises utdrs ________ reads bks indrs every weekend. (3)Nt nly had she __________(prvide) the ld man with accmmdatins, but she had als bught a single fr him. 【答案】(1)attaches　(2)but(als)　(3)prvided　
完成句子　(4)___________________ has gt stuck in the traffic jam. 不仅是学生们，老师也被困在了交通堵塞中。【答案】(4)Nt nly the students but (als) the teacher　
【例句观察】　①The truble is that I have lst his address. ②Fame and persnal gain is what they’re after. ③The questin is wh we shuld trust. ④—Are yu still thinking abut yesterday’s game?—Oh, that’s what makes me feel excited.
【我的领悟】　句①②③④中画线部分都是引导的 ________从句，其中，句①中that在从句中不作任何成分，句②中what在从句中作__________；句③的wh在从句中作__________；句④的what在从句中作__________。Keys：表语； 宾语；宾语；主语　
一、定义及类型　在复合句中作表语的从句叫表语从句。引导表语从句的关联词与引导主语从句的关联词大致一样。表语从句位于连系动词后，一般结构是“主语＋连系动词＋表语从句”。
常见的系动词的三种类型：　A．表示特征或状态：be, lk, seem, sund, taste, smell, appear等。B．表示由一类状态转为另一类状态：get, becme, grw, turn, fall, g, cme, run等。C．表示持续某种状态：remain, keep, prve, cntinue, stay等。
The truble is that we are shrt f mney. 问题是我们资金短缺。That is why stne walls are used instead f fences arund New England fields. 这就是为什么在新英格兰用石头墙而不用栅栏的原因。
二、表语从句的引导词　引导表语从句的词有从属连词that, whether，连接代词和连接副词，以及as if, as thugh, because等其他连词。
1．由从属连词that，whether引导的表语从句　从属连词that的用法：①无意义；②不充当成分。而whether有词义，意为“是否”。这时主句的主语常常是某些抽象名词，如questin，truble，prblem，result，chance，suggestin，idea，reasn 等。表语从句对主句主语进行说明、解释，使主语的内容具体化。
The reasn fr his absence is that he hasn’t been infrmed. 他缺席的原因是没有通知他。The pint is whether we shuld lend him the mney. 关键在于我们是否应该借钱给他。What she culdn’t understand was that fewer and fewer students shwed interest in her lessns. 她不能理解的是越来越少的学生对她的课感兴趣。
【温馨提示】　if不能引导表语从句。2．由连接代词引导的表语从句　在连接代词wh，what，which，whm，whse等引导的表语从句中，连接代词在句中作主语、宾语或表语等，并且不能省略。
The questin is which f us shuld g. 问题是我们哪一个应该去。The prblem was wh culd d the wrk. 问题是谁能做这项工作。That’s what he is wrrying abut. 那就是他在担心的事。That’s what we shuld d. 那是我们应该做的。
3．由连接副词引导的表语从句　在连接副词 when，where，why，hw 等引导的表语从句中，连接副词在从句中作状语。G and get yur cat. It’s where yu left it. 去把你的衣服拿来。就在你原来放的地方。
I had neither a raincat nr an umbrella. That’s why I gt wet thrugh. 我既没雨衣也没雨伞。那就是我湿透的原因。That is hw mice ruin many stres f grain every year. 那就是老鼠每年怎样损害大量粮食的。
4．由其他连词because，as if/as thugh等引导的表语从句　It lked as if it was ging t snw. 看起来好像要下雪了。That’s because we never thught f it. 这是因为我们从未想过此事。It seems as thugh he didn’t knw the answer. 好像他不知道答案。
【易混辨析】　why 和 because 引导的表语从句的区别　
I didn’t phne her，and that’s why she gt angry with me. (强调“没打电话”这一结果)　我没有给她打电话。那就是她对我生气的原因。I didn’t phne her，and that’s because I gt angry with her. (强调“生气”这一原因)　我没有给她打电话。那是因为我生她的气了。
【温馨提示】　reasn 作主语时，后面的表语从句表示原因时要用 that 引导，不宜用 because。
5．表语从句中的虚拟语气　在表语从句中，表示间接的命令、要求、请求、建议、决定等，主句中的主语通常是：advice，suggestin，prpsal，request，rder，idea等，从句谓语形式是“shuld＋动词原形”(shuld可以省略)。
My advice is that yu(shuld) practise speaking English as ften as pssible. 我的建议是你(应该)尽可能多地练习说英语。My suggestin is that we shuld tell him. 我的建议是我们应该告诉他。
Ⅰ．单句语法填空　1．The traditinal view is ____________we sleep because ur brain is “prgrammed” t make us d s. 2．See the flags n tp f the building? That was __________ we did this mrning. 3．The energy is ____________ makes the cells able t d their wrk. 【答案】1．that　2．what　3．what　
4．What I want t knw is ____________ he likes the gift given by us. 5．The prblem is ____________ we can get t take the place f Ted. 6．The reasn why he failed is ____________ he was t careless. 【答案】4．whether　5．wh　6．that　
7．The truble is ____________ we are shrt f tls. 8．America was ____________ was first called “India” by Clumbus. 9．What he really means is ____________ he disagrees with us. 10．—I drve t Zhuhai fr the air shw last week. —Is that __________________ yu had a few days ff?【答案】7．that　8．what　9．that　10．why　
Ⅱ．完成句子　1．The questin is ______________ at the party tmrrw. 问题是他明天会什么时候出现在聚会。【答案】1．when he will shw up　
2．What made the schl prud was _______________ had been admitted t key universities. 让这个学校感到骄傲的是，超过90%的学生被重点大学录取。3．________________ it was t valuable fr everyday use. 问题是它作为日常之用太贵了。【答案】 2．that mre than 90% f the students　3．the prblem was that　
4．What yur father wants t knw is _____________ getting n with yur studies. 你父亲想知道的是你的学习情况如何。5．What surprised me was _______________ he said it. 使我吃惊的不是他说什么，而是他说话的方式。【答案】4．hw yu are　5．nt what he said but the way　
Ⅰ．单词拼写　1．This research has dne much t __________(促进；进步) ur understanding f language learning. 2．Nw the experts are devted t the research n the ________(疫苗). 3．There is __________(可靠的) evidence t shw he wasn’t there when the crime tk place. 【答案】1．advance　2．vaccine　3．slid　
4．His ________(最初的) reactin t this matter is excellent. 5．I want t knw what yur __________(思想；见解) is n this questin. 6．Scientists have recently prvided us with sme wrrying ______________(发现；研究结果). 7．An unknwn __________(病毒) has just attacked my cmputer. 【答案】4．initial　5．thinking　6．findings　7．virus　
8．Fish was a majr surce f ______________(蛋白质) fr the wrking man. 9．Thse ______________(细胞) divide and give many ther different types. 10．This bridge ver the river has a steel ____________(框架). 【答案】8．prtein　9．cells　10．framewrk　
Ⅱ．短语填空　in advance；make sense；carry ut；rather than；care abut；in the first place；get dwn t　1．With the electin ut f the way(结束)，the gvernment can ________ business. 2．Yu have t fix visits up____________ with the museum. 【答案】1．get dwn t　2．in advance　
3．Planning s far ahead desn’t__________—s many things will have changed by the end f next year. 4．Armed with the new GNSS(全球导航卫星系统)，they’re able t ________________ their plans t help peple. 5．T master a freign language，we shuld have a large vcabulary ________. 【答案】3．make sense　4．carry ut　5．in the first place　
6．In my pinin，yu shuldn’t ____________yur appearance t much. 7．It’s better t express yur anger，____________________ bttle it up(压抑). 【答案】6．care abut　7．rather than　
Ⅲ．完成句子　1．_________________ asking questins if yu dn’t listen t the answer. 如果你不听答案，提问题就没有意义了。2．It was _________________ that I realised the imprtance f team wrk. 直到上学期，我才意识到团队合作的重要性。【答案】1．There is n sense in　2．nt until last term
3．_____________________ Spanish, but she’s als gd with cmputers. 她不仅会说西班牙语，还精通计算机。4．Tang Petry is __________________ the next class, scheduled n 20 July in the schl library. 唐诗是我们下节课要学的内容，预定于7月20日在学校图书馆进行。【答案】3．Nt nly des she speak　4．what we are ging t learn