人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists完整版ppt课件

这是一份人教版 (2019)选择性必修 第二册Unit 1 Science and Scientists完整版ppt课件，共60页。PPT课件主要包含了表从中不用if，Attention，that，whether等内容，欢迎下载使用。
Lead-in：
The utdr activity seems attractive.
The by remains puzzled.
This is a diligent student.
His jb is t teach chemistry.
His diarrhea seems severe.
The tw plicies are cntradictry.
This is a water pump.
His jb is t handle the prblem.
Observe and Discver：
What d the sentences have in cmmn in their structures?
predicative
表语是用来说明主语的身份、性质、品性、特征和状态的，表语常由名词、代词、数词、动词过去分词、动词的-ing形式、副词、介词短语、形容词、不定式和从句等来充当。
His diarrhea seems severe.The tw plicies are cntradictry.This is a water pump.His jb is t handle the prblem.
Observe the sentences and think abut what is a predicative clause.
tw cntradictry theries
Thery ne: __________________
caused by bad air
Thery tw: __________________
caused by germs
One thery was that bad air caused the disease.
____________
表语从句是指______________________, 紧跟在________之后，对主语进行解释、说明，使主语的内容具体化。
在复合句中作表语的从句叫做表语从句。位于主句的系动词之后，对主语进行解释、说明，使主语的内容具体化。
主语 + 系动词 + 表语从句(引导词+其他)
①What Jhn Snw shwed t the wrld was hw chlera culd be vercme. ②The exact places Snw marked n the map were where all thse wh died had lived.③Snw’s finding was that the pump water carried chlera germs.
状态类：be 感官类：feel/lk/sund/taste/smell 持续类：stand/remain/keep/stay变化类：becme/get/grw/turn/g/cme/run/fall似乎类：seem/appear结果类：prve/turn ut
可以接表语从句系动词有：
结果是...;证明是...
1. 从属连词that引导的表语从句
The fact is that he was lying.The reasn is that they never give up. His suggestin is that we shuld tell him. One idea is that fish is the best brain fd.
that 仅起_______作用，______(有/无)词义，______(是/否)充当句子成分，通常________(能/不能)省略。
1.从属连词whether 引导的表语从句
The questin is if we can finish ur wrk.The questin is whether the film is wrth watching. The dctr’s dubt is whether she will survive.
whether起 _________ 作用，意为“_______”，在句中_________(是/否)作成分。(注意：if ______(能/不能)引导表语从句)。
1.从属连词as if/ as thugh/ because 引导的表语从句
It sunds as if / thugh smene is kncking at the dr.She lked as if she had been hit by lightning.It seems as if she were mad.He did nt see the film last night. That is because he had seen it befre.
as if/thugh 在从句中________(是/否)充当成分，意为“______________”;若表语从句所述的是非真实的情况，从句用_________(主句一般现在时，从句用_________时；主句过去式，从句___________时)；because在从句中_______(是/否)充当成分，意为“______________”
表语从句的虚拟语气 一坚持（insist) 二命令（rder, cmmand) 三建议（advise, suggest, prpse) 四要求（ask, require, request, demand) 当主句的主语是表示建议、命令、要求等后面的表语，那么表语从句应该用虚拟语气，即谓语动词用“shuld + 动词原形”，shuld可省略。 His suggestin is that she ________________(keep) quiet. My advice is that we _______________(ride) t the park.
(shuld) keep
(shuld) ride
2. 连接代词what(ever), which, wh(ever), whm(ever), whse等引导的表语从句
My hmetwn is n lnger what it used t be. The prblem is wh we can get t replace her.The prblem is whse wrk is the best. The questin is what caused the accident, the pr whether r the heavy traffic?
连接代词在句中起_______作用，还在从句中还充当______、______、______、_______,______(有/无)意义，________(能/不能)省略。
3. 连接副词when, where, hw, why引导的表语从句
The prblem is hw we can find him.That is where I first met her.That's why I bject t the plan.Thanksgiving is when peple celebrate the harvest.
连接副词在句中起________作用,还在从句中充当_______, _______，______，_______状语，________(能/不能)省略。
其它连接词because, as if ,as thugh因为，好像，似乎
That’ why... That’s because... The reasn(why...) is that...
I didn’t phne her. That ’s why she gt angry with me .I didn’t phne her .That ’s because I gt angry with her gt angry with me ,and the reasn was ____ I didn’t phne her . The reasn why she gt angry with me was that I didn’t phne her.
用法归纳：a. That’s why … 那是…的原因 强调结果b. That’s because … 那是因为… 强调原因c. The reasn is / was that … 不可用because或者why.
如果引出表语从句的名词是表示 “建议”或者是“命令”之类的词如advice, suggestin, prpsal, rder, plan, idea等, 从句中的动词用虚拟语气，即(shuld)+动词原形。
My suggestin is that we all (shuld) take an active part in the cming sprts meet. 我的建议是我们每个人都应该积极参加运动会。
说明主语是什么或者怎么样。
主语+系动词+表语从句(引导词+其他)
从属连词：_______,____________;连接代词:______________________ _______________________________;连接副词:________________________ ;其他词:_________________________.
what, wh, whm, whse, which ...
when, where, why, hw...
because, as if, as thugh ...
Practice and Apply：
The reasn why he is late fr schl is ________ he missed the bus.2. Why we decided t put ff the ftball match is ________ the weather was t bad.
当主句的主语是 _____________ 或 why 引导的 __________时常用 ______ 来引导表语从句，而不用 because。
3. I think that’s _____ he was s angry.4. I think it is ________ yu are ding t much.5. The reasn ______ he was s late is _____ it was raining hard.
that / this / it + is / was +why + ________ (原因 / 结果) 表示“_________________________”that / this / it + is / was + because + _______ (原因 / 结果) 表示“________________________”the reasn why … is that … 中 why 是引导 _________，that 引导的是 _________，表示“___________________”。
这 / 那就是……的原因
这 / 那就是因为……
6. My suggestin is that we ____________ (g) and help him.7. My advice is that we ____________ (get) there by train.
(shuld) get
当主句的主语是表示建议（suggestin, advice）、命令（rder）、要求（request, prpsal）、计划（plan）等的名词时，表语从句要用虚拟语气，即（shuld）+ 动词原形。
The prblem is ___________we can finish the task r nt. The questin is ________we can get in tuch with him. The mst pleasant thing f the rainy seasn is ________ne can be entirely free frm dust.Running means ding the same thing fr a while. That is ________ I did’t enjy running.The questin is _________ caused the accident. The mst imprtant thing is ___________ respnsibility it is.
1. My belief is ______________I will succeed by wrking hard.2. The mst pleasant thing f the rainy seasn is ________ne can be entirely free frm dust.3. The prblem is ______________we can find them there. 4. Yu can be __________ yu want t be. 5. The questin is ____________ caused the accident. 6. The mst imprtant thing is ____________ respnsibility it is.7. This is ____________I dn't agree with yu. 8. The questin is _______________we can get in tuch with him. 9. That is _________ I gt wet thrugh.
Cmplete the fllwing ideas by famus scientists with a wrd r expressin that intrduces a predicative clause and translate them in yur wn wrds.
Research is _________ I’m ding when I dn’t knw what I’m ding. (Werner vn Braun)
as thugh because that what whever why
2. The saddest aspect f life right nw is _______ science gathers knwledge faster than sciety gathers wisdm. (Isaac Asimv)
3. An expert can be _________ has made all the mistakes that can be made in a very narrw field. (Niles Bhr)
4. When different experiments give yu the same result, it is n lnger subject t yur pinin. That’s the gd thing abut science: It is true whether r nt yu believe in it. That’s _________ it wrks. (Neil deGrasse Tysn)
5. This applied science, which saves wrk and makes life easier, brings us little happiness. That is _________ we have nt yet learnt t make sensible use f it! (Albert Einstein)
6. There are nly tw ways t live yur life. One is ____________ nthing is a miracle. The ther is ____________ everything is a miracle. (Albert Einstein)
Attentin：
He failed in the exam. That's _______ he felt frustrated.
felt frustrated.
failed in the exam.
1.表从中易错连接词 why because
He felt frustrated. That's __________he failed in the exam.
He failed in the exam. That's why he felt frustrated.
He felt frustrated. That's because he failed in the exam.
结构：因 why 果； 果 because 因
语意：各自表达的侧重点不同
I lst the game. The reasn was ______ I underestimated my cmpetitrs.The reasn ___ I lst the game was _____ I underestimated my cmpetitrs.I lst the game. That was __________ I underestimated my cmpetitrs.
名词reasn作主语时，后面的表语从句表示原因时要用that引导。
2.表从中易错连接词 that; because
He is t blame. That's because he passed a slip f paper in class. He is t blame. The reasn is that he passed a slip f paper in class.
He is t blame.
He passed a slip f paper in class.
The yung girl with shrt hair lks ________ she were a by.
as ifas thugh
这个留短发的女生看起来像是个男生。
3.表从中易错连接词 as if/as thugh
He talks as if he _________(be) t the mn.
他说的好像去过月球一样。
Dark cluds are gathering. It seems as if it is ging t rain.
as if/as thugh引导的表语从句如果与事实不符，用虚拟语气;如果是事实或者有发生的可能性，用陈述语气
1. It sunds as if smene ___ kncking at the dr. (与事实相符)2. Tm likes t talk big as if he ______(be) an imprtant persn. (对现在的虚拟，用一般过去时，be动词用were )3. He talks as if he _______ becme president tmrrw. (对将来的虚拟，用wuld/culd/might+d)4. He talked abut Rme as if he __________(be) there.(对过去的虚拟，用had dne)
SUMMARY：
从属连词，连接代词，连接副词(注意：as/as if/as thugh/because)
That is is because...
The reasn(why...) is is because...
as if/as thugh