人教版 (2019)Unit 1 Science and Scientists教学课件ppt

这是一份人教版 (2019)Unit 1 Science and Scientists教学课件ppt，共19页。PPT课件主要包含了Leading-in，Part1，Leading in，Part2，Part3，where，wherewhy，that，when等内容，欢迎下载使用。

While-class
After-class
Teaching Objects:(1) Knwledge Objective:Students will master the usage f predicative clauses thrugh self-study and practice(2)Ability Objective:Students can use predicative clauses t express their ideas.(3)Emtinal Objectives:Students can fster the interest and desire f learning English grammar.
read the fllwing sentences and answer the questin:In thse days,there were tw cntradictry theries t explain hw chlera spread.One thery was that bad air caused the disease.Anther was that chlera was caused by an infectin frm germs in fd r water.Snw subscribed t the secnd thery.One evidence is that a wman and her daughter had died f chlera after mving away frm Brad Street.It seemed that she liked the water frm the pump s much that she had it delivered t her huse every day.The truth was that the water frm the Brad Street pump had been infected by waste.?
1.Can yu find any predicative clauses?2.Why d yu think they are predicative clauses?3.What are the main linking verbs?
Summary: Guiding wrds shuld be chsen accrding t their functins and meanings.
需要注意的问题①as if/thugh 引导的表语从句的语气as if/thugh 引导的表语从句常置于连系动词lk, seem, appear, sund, feel 等后。若表述真实的情况，就用陈述语气；若表述与客观事实相反的假设，则用虚拟语气。It seems as if he benefits a lt frm the prject.看起来好像他从这个项目中获益不少。 (陈述语气）It lks as if/thugh he were drunk.他看上去好像喝醉了。 (虚拟语气）
②表语从句的特殊句式（The reasn why. . .is that. . . ……的原因是····· (why引导定语从句，修饰 the reasn, that引导表语从句）This/That/It is because . . . 这／那是因为······ (because引导表语从句，从句表原因）This/That/It is why . . . 这／那就是······的原因。 (why引导表语从句，从句表结果）The reasn why he didn't cme is that he didn't receive the invitatin. 他没来的原因是他没有收到请柬。The wman was weeping bitterly. That's because her sn was drwned in a river. 那位女士痛哭流涕，那是因为她的儿子在河中溺亡了。 (先果后因）The wman's sn was drwned in a river. That's why she was weeping bitterly. 那位女士的儿子在河中溺亡了，那是她痛哭流涕的原因。 (先因后果）
③ 表语从句中的虚拟语气主语是表示“建议、命令、要求”的名词，如 suggestin, advice, prpsal, rder, cmmand, request, requirement, demand 等时，表语从句应使用虚拟语气，即从句谓语用“shuld+动词原形”，shuld可以省略。My suggestin is that we (shuld) set ff early tmrrw.我的建议是我们明天早点儿动身。His rder was that all bys gather quickly arund the car. 他的命令是所有男孩子要速在汽车周围集合。
Wrk in grups.Cmplete the cnversatins using the predicative clauses.Every grup can chse ne r tw dialgues,and each member must cmplete at least tw predicative clauses.1.A:Papermaking,printing,gunpwder,and the cmpass are the fur great inventins f ancient China.They are significant cntributins f the Chinese natin t the wrld.B:Sure,they are.What I want t knw thugh is 　　　　　　　　　　　　. 
2.A:The ancient Chinese were the first t invent paper and printing.Then they went n t invent bks and had pened bkshps in many cities.B:What I'm curius abut is 　　　　　　　　　　　　　　　　　　　　　　. 
3.A:The cmpass is a special inventin f ancient China,dating back t as early as the Warring States Perid.B:Yes.It seems 　　　　　　　　　　　　　　　　　　　　　　　　　. 
4.A:Gunpwder was riginally used fr making firewrks.B:But what surprises me is 　　　　　　　　　　　　　　　　　　　　　. 
5.A:High-speed trains,mbile payments,the bike-sharing system,and nline shpping are cnsidered by sme as the new “fur inventins” f China.B:Is that s? I feel/It seems 　　　　　　　　　. 
I Fill in the blanks with a guiding wrds.1. Lk at the tallest building. That is ________my father wrks.2. One f the mst exciting mments in my life was ______ I wn first place in the singing cmpetitin.3. Nw, the nly prblem is _________________ we can cllect enugh mney fr the prject.4. One advantage f slar energy is _____ it will never run ut.5. What is trubling me is _____ I dn't have much experience in this kind f wrk.6. That's __________ yu are wrng. Yu frgt Step Three.
hw/when/whether