高中英语人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists课堂教学ppt课件

这是一份高中英语人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists课堂教学ppt课件，共23页。PPT课件主要包含了语法精讲透析，that，where，why，will be，were，who，is raining，had lived，常温故·勤总结等内容，欢迎下载使用。
表语从句 【体验·悟】阅读下面课文原句,体会句中表语从句的用法。1.One thery was that bad air caused the was that chlera was caused by an infectin frm germs in fd r truth was that the water frm the Brad Street pump had been infected by seemed that the wman liked the water frm the pump s much that she had it delivered t her huse every day.
【生成·得】 表语从句是在主从复合句中作_____的从句。引导表语从句的词可以是____,它只起引导作用,本身无词义,且不能省略。
【研学·析】　　表语从句是用来说明主语的身份、性质、品性、特征和状态的从句,常位于系动词之后。引导表语从句的词有从属连词、连接代词和连接副词。 1.由从属连词that,whether引导的表语从句。(1)that在引导表语从句时无词义,而whether有词义,意为“是否”。(2)主句的主语常常是一些抽象名词,如questin(问题),truble(麻烦),prblem(问题),result(结果),chance(可能性),idea(想法),reasn(理由)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。
(3)主句的主语如果是advice, suggestin, rder, request, requirement等时,表语从句应用虚拟语气,即谓语动词用“(shuld +)动词原形”。①The truble is ________________________(她丢了钱). ②The questin is ____________________________(我们是否还需要更多的冰淇淋). ③My advice is that yu ______________________________(练习说英语) as ften as pssible. 
that she has lst her mney
whether we need mre ice cream
(shuld) practise speaking English
2.由连接代词引导的表语从句。连接代词wh, what, which, whm, whse等引导表语从句,在表语从句中作主语、宾语、表语,连接代词不能省略。①That’s _______________________(他正在担心的事). ②What I want t knw is __________________________(谁将带我们去车站). ③The questin is ____________________________(我应该选哪一台电脑). 
what he is wrrying abut
wh will lead us t the statin
which cmputer I shuld chse
3.由连接副词引导的表语从句。连接副词 where, when, hw, why 等引导表语从句,在表语从句中作状语,连接副词不能省略。①G and get yur cat.It’s ______ yu left it. ②I had neither a raincat nr an umbrella.That’s ____ I gt wet thrugh. ③She had a bad cld.That is ____ she didn’t attend schl yesterday.
4.由从属连词because引导的表语从句。It/This/That is because...句型中从属连词because引导表语从句,意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由, “That is why...”则指各种原因所造成的结果。①昨天晚上他没有去看电影, 那是因为他有很多作业要做。____________________________________________________________________.  ②这是因为她没有理解我的意思。 ____________________________________ ③我想这是因为你做得太多。_______________________________________
He did nt see the film last night.That is because he had much hmewrk t d
This is because she didn’t understand me.
I think it is because yu are ding t much. 
5.由从属连词 as if/as thugh引导的表语从句。 as if/as thugh引导的表语从句,其谓语动词一般为系动词seem, lk, sund等,意为“好像,仿佛,犹如”。二者引导的从句中,谓语部分经常使用虚拟语气。表示与现在事实情况不符或相反时,谓语动词多使用过去式(be的过去式一般用were,在非正式英语中,主语是一、三人称时也可以用was)。表示与过去事实情况不符或相反时,谓语部分经常使用“had+过去分词”。表示与将来事实情况不符或相反时,谓语部分经常使用“wuld +动词原形”。
①We have nly ten minutes left.It lks as if we ______(be) late. ②She lves Tm very much.It lks as if he _____(be) her sn.③It lks as if ________________(要下雪了). ④It seems as if _______________________(他不知道答案). 
it is ging t snw
he didn’t knw the answer
【内化·用】 语法填空。①The prblem is ____can replace her.②Listen, it sunds as if it _________(rain)utside. ③This is ______they nce lived.④It lked as if we ________(live) here fr ten years. 
【点拨迷津】 表语从句易错点(1)表语从句的语序要用陈述语序;(2)reasn作主语时,只能用that引导;(3)if不能引导表语从句。
Ⅰ.选用适当的连接词填空that, where, what, hw, why, whether, because, as if1.The questin discussed at the meeting was _______ it was wrth this was ver twenty years ag, but it seems ________it were nly yesterday. 3.The truble is ____ I lst the key t my rm.4.I’m a bit sleepy.It’s _______ I was up all was ______ I spent my suggestin is ____ we (shuld) start early tmrrw.
7.I didn’t phne her, and that’s ____ she gt angry with ways will be fund t stp pllutin r nt is just _____ wrries the prblem is ____ we can finish the task befre Tuesday.
Ⅱ.完成句子1.The fact was _____________________. 事实是他没有真正地努力过。2.The questin is __________________________. 问题是明天是否会下雨。3.It seems ___________________________________. 看起来她好像已经认识米莉好多年了。4.That’s __________________. 那就是我第一次遇见她的地方。
that he didn’t really try
whether it will rain tmrrw
as if/that she had knwn Millie fr years
where I first met her
5.The prblem is ____________________________. 问题是谁真正适合做这份艰苦的工作。6.That’s ________________________________. 那就是我写信发表我自己的观点的原因。7.The questin remains _______________________________. 问题还是他们能否帮我们。8.The little girl is n lnger _________________. 这个小女孩已经不再是以前的那个小女孩了。
wh is really fit fr the hard jb
why I’m writing t vice my pinin
whether they will be able t help us
what she used t be
Ⅲ.语法填空 阅读下面短文, 在空白处填入1个适当的单词或括号内单词的正确形式。 Way back in 1674, a frg helped Antnie van Leeuwenhek make an incredible discvery.Antnie was an amateur scientist frm Hlland, s fascinated by micrscpes 1.______ he’d built sme f his wn.One rainy day, as he went fr a walk, a leaping frg 2. ______ (draw) his attentin t a puddle. Antnie cllected a drp f puddle water and put it 3. ______ his micrscpe.He was amazed 4. ______ (see) a whle cmmunity f creatures swimming in this ne drp — tiny beings n ne had ever seen befre.
These tiny beings, called micrbes, are everywhere: in dirt, in fd and n yur kitchen table.Peple 5. ______ (cver) in them, t.6. ______ yu were t cunt all the micrbes n and inside yur bdy, yu wuld find yur bdy has mre micrbes than the wrld has peple—ver 10 billin! Micrbes can’t survive n 7. ____ (they) wn.They need fd.After 8. _____(settle) int a hme—yu, fr instance—they steal vitamins and ther nutrients and leave behind dead cells and pisnus liquids called txins.Sme micrbes can make yu sick.Peple usually call these nes germs.9. ____ (lucky) fr yu, there are mre 10. _____ (help) micrbes, wrking tgether t keep yu healthy, than bad nes.
【语篇概述】本文是一篇说明文,通过安东尼·列文虎克用显微镜发现水滴中的微生物引出话题,指出微生物无处不在,但大多数微生物对人体是有益的。1.【解析】that。考查连词。根据前文的s可知本空应用that引导结果状语从句,意为“如此……以至于……”。2.【解析】drew。考查动词时态。根据One rainy day,as he went fr a walk可知本句应用一般过去时,所以填drew。3.【解析】under。考查介词。根据常识可知,要把物体放到显微镜下面观察, 故用介词under“在……下面”。
4.【解析】t see。考查固定搭配。be amazed t d sth.为固定用法,意为“对做某事感到很惊讶”。5.【解析】are cvered。考查动词时态和语态。根据语境可知,此处讲述客观事实,应用一般现在时;本句中的cver和主语Peple之间是被动关系,故应用一般现在时的被动语态,故填are cvered。6.【解析】If。考查连词。句意:如果你要数你身体上和身体内所有的微生物,你会发现你的身体内外有比世界上的人口还要多的微生物——超过100亿!根据语境可知,本空应用连词If引导条件状语从句。