外研版 (2019)选择性必修 第一册Unit 5 Revealing nature备课课件ppt

这是一份外研版 (2019)选择性必修 第一册Unit 5 Revealing nature备课课件ppt，共32页。PPT课件主要包含了要点精研·探究学习，语法新知·对接课堂，语法探究·核心突破，课时达标·随堂自测，for，to blame，Blamed，to tell，declined，harmful等内容，欢迎下载使用。
1.blame v．责怪，指责；把……归咎于　n．责任(教材原句)The extinctin f the Pinta Island trtise is blamed n humans.平塔岛龟的灭绝应归咎于人类。❶Dn't blame me—it's nt my fault.别怪我——又不是我的错。❷The ther driver blamed me fr the accident.＝The ther driver blamed the accident n me.另一个司机把事故归咎于我。❸Jhn is t blame fr the accident.约翰应对这次事故负责。❹The cmpany was ready t take the blame fr what had happened.公司准备对已发生的事情承担责任。
[归纳探究]blame sb./sth. fr sth.＝blame sth. n sb./sth. 把某事归咎于某人/某物blame sb. fr (ding) sth. 因(做)某事而责备某人take/accept the blame (fr sth.) 承担(某事的)责任put/lay/place the blame n sb. 把责任归咎于某人the blame lies with sb. 责任在于某人
[巧学助记]　He was blamed fr the serius mistake, but he blamed it n thers. In fact, it is he, nt thers, that is t blame fr it．他因这个严重错误受到了责备，但他把它归咎于别人。事实上，是他，而不是别人，对此负有责任。
[即学即练]　单句语法填空①Sme peple blame the smartphne ________ the tragedy, yet in fact peple's weakening self-cntrl and self-discipline are ________ (blame)．②________ (blame) fr the breakdwn f the schl cmputer netwrk, Alice was in lw spirits.③One f the cmputers is brken and she's blaming it ________ me.④N ne was prepared t take the blame ________ the disaster.
2.decline v．减少，降低；拒绝；谢绝　n．减少，下降，衰落(教材原句)After gats in particular had been brught t the island, the Pinta Island trtise ppulatin declined.特别是山羊被带到岛上之后，平塔岛龟的数量下降了。❶Accrding t the statistics, the sales f huses declined by 20%.据统计，房屋销售量下降了20%。❷This sectin f the market has slwly declined in imprtance.这部分市场的重要性已慢慢下降。❸He declined t take n the task assigned t him.他拒绝接受分配给他的任务。❹There was a decline in traffic accidents in the city last year.去年这个城市的交通事故有所减少。❺The number f peaccks in this regin is n the decline.这个地区的孔雀数量在减少。
[归纳探究]decline by... 减少了……(比较：decline t...减少到……)decline in... 在……方面降低decline t d sth. 拒绝做某事a decline in... 在……方面的下降in decline/n the decline 在下降fall/g int decline 开始衰落
[即学即练]　单句语法填空/完成句子①There has been a decline ________ the size f families.②Car sales have declined ________ a quarter.③There's a widely-held belief that educatinal standards are ________ the decline.④After the war, the city declined ________ imprtance.⑤Why d yu always decline ________ (tell) me where yu live?⑥I invited him t the meeting but he ________ (decline)．⑦Mary _________________ (谢绝了我的邀请) t dinner.⑧He is still ne f the wrld's mst ppular glfers, but his game is ___________ (在走下坡路)．
declined my invitatin
n the decline
3.be harmful t对……有害(教材原句)Bacteria are always harmful t humans.细菌总是对人类有害。❶Such chemical absrbed by plants can be harmful t humans and animals.这种被植物吸收的化学物质可能对人和动物有害。❷If yu dn't warm up prperly, exercise may d mre harm than gd.你如果不做适当的热身运动，锻炼有可能弊大于利。❸He may say nt, but there's n harm in asking.他可能拒绝，但问一问也无妨。❹He meant n harm when he said that.他那样说并没有恶意。
[归纳探究]d harm t sb./sth.＝d sb./sth. harm 对某人/某物有害cause sb./sth. harm 对某人/某物造成伤害suffer harm 受到损害d mre harm than gd 弊大于利there is n harm in ding sth. 不妨做某事，做某事没有坏处mean n harm/nt mean any harm 无意伤害，没有恶意
[即学即练]　单句语法填空/完成句子①Try t reduce the use f chemicals that are ________ (harm) t the envirnment.②Mdern farming methds have dne cnsiderable harm ________ the cuntryside.③It is a parent's respnsibility t ensure that their children _________________ (不受任何伤害)．④It wuldn't _____________ (对你有任何伤害) t get sme experience first.
d nt suffer any harm
d yu any harm
4.(教材原句)Hwever, diversity n ur planet is such, that there are still millins f species n Earth remaining t be discvered.然而，我们星球上的多样性是如此之大，地球上还有数百万物种有待发现。 [句式解构]　如此……以至于……这是一个常见的句型。be such that和都意为“如此……以至于……”，两种结构中的that从句都是结果状语从句。本句中such＝s much。❶Her excitement was such that she culd hardly cntain herself.她激动得几乎控制不住自己。❷He is such a helpful persn that we are all appreciative f him.他是如此乐于助人，我们都很感激他。
[巧学助记]　当such位于句首时，该句型的意义并未发生变化。Such was his strength that he culd lift the big stne.他的力气大得能把这块大石头举起来。
[即学即练]　单句语法填空/完成句子①The perfrmance was ________ that the audience were deeply mved.②It's ________ an interesting flk tale that everybdy likes it.③_________________________________ (他反应如此敏捷) that n ne can match him.④_____________________ (灾难如此严重) the lcal authrities were quite unable t cpe with it.
His reactins are such/Such are his reactins
The disaster was such that
熟记下列重要知识点①f all time 有史以来②answer the call 响应号召③be regarded as 被认为是④be similar t 与……相似⑤be hme t 是……的家园/栖息地/产地⑥be native t 源于……的，原产于……⑦cnsist f＝be made up f 由……组成⑧carry ut 执行，实行⑨s far 到目前为止⑩by cntrast 相比之下
过去完成时一、语法现象感知①They had gt everything ready befre I came.②She had hardly gne t bed when the bell rang.③I had intended t call n yu yesterday, but smene came t see me just when I was abut t leave.④It was the first time that he had lst the game.⑤If I had fllwed yur advice, I wuld be better nw.
二、语法规则理解1．由句①可知，过去完成时表示在过去某个动作或某个具体时间________已经发生、完成的动作或情况。2．由句②可知，过去完成时常与________， scarcely, barely, n 等副词连用。3．由句③可知，intend, mean, hpe, want, plan, think等动词的过去完成时可以用来表示一个____________________。4．由句④可知，在句型________________________________中，常用过去完成时。5．由句⑤可知，过去完成时还可用在与________相反的虚拟从句中。
本来打算做而没有做的事
It/This/That was the that...
过去完成时一、构成：had＋过去分词二、功能1．表示在过去某一时刻或动作以前完成了的动作，也可以说过去的时间关于过去的动作。即“过去的过去”。可以用by, befre等介词短语或一个时间状语从句来表示，也可以用一个表示过去的动作来表示，还可以通过上下文来表示。By nine 'clck last night, we had gt 200 pictures frm the spaceship.到昨晚9点钟，我们已经收到200张飞船发来的图片。
2．表示从过去的某一时刻开始，一直延续到过去另一时间的动作或状态，常和fr, since构成的时间状语连用。❶I had been at the bus stp fr 20 minutes when a bus finally came.当公共汽车来的时候，我在车站已等了20分钟。❷He said he had wrked in that factry since 1949.他说自从1949年以来他就在那家工厂工作。3．过去完成时常常用在tld, said, knew, heard, thught等动词后的宾语从句(或间接引语)中，这时从句中的动作发生在主句表示的过去的动作之前。❶He said that he had knwn her well.他说他很熟悉她。❷I thught I had sent the letter a week befre.我认为我一星期前就把信寄出去了。
5．动词think, want, hpe, mean, plan, intend等用过去完成时来表示过去未曾实现的想法、希望、打算或意图等。❶They had wanted t help but culd nt get there in time.他们本来打算去帮忙，但没有及时赶到那里。❷We had hped t be able t cme and see yu.我们本来希望能来看看你。6．过去完成时还可用在, n , It was the first (secnd, etc.) time (that)．..等固定句型中。❶N sner had he arrived than he went away again.他刚到就又走了。❷It was the third time that he had been ut f wrk that year.这是他那一年第三次失业了。
7．表示与过去事实相反的虚拟语气if从句中，常用过去完成时。If we hadn't made adequate preparatins, the cnference wuldn't have been s successful.如果我们没有做充分准备的话，会议是不会开得这么成功的。
Ⅰ.单句语法填空1．We ffered t give Sharn a ride hme, but she ________ (decline), saying that she felt like walking.2．Picking up her “Lifetime Achievement” award, prud Irene ________ (declare) she had n plans t retire frm her 36-year-ld business.3．Sme scial app cmpanies were ________ (blame) because they didn't adequately check their users' registratin.
4．It's the seaside birds that deserve at least part f the blame ________ getting Nick Burchill blacklisted at the Fairmnt Empress Htel in Victria, Canada.5．His effrts have resulted in 1，360 acres f naturally-grwn land that has becme hme ________ many plants and animals.6．As the ecnmy was ________ decline, sme peple in the twn had lst their jbs.
Ⅱ.用括号内词的适当形式填空1．She asked me whether I __________ (return) the bks t the library, and I admitted that I hadn't.2．Researchers were puzzled ver the results, which were cmpletely ppsite t what they __________ (expect)．3．Just as I gt t the schl gate, I realized I ________ (leave) my bk in the cafe.4．—Did yu enjy the party?—Yes. We __________ (treat) well by ur hsts.5．I wish I ________ (be) at my sister's wedding last Tuesday, but I was n a business trip in New Yrk then.
had returned
had expected
were treated