外研版 (2019)选择性必修 第四册Unit 5 Into the unknown课文ppt课件

这是一份外研版 (2019)选择性必修 第四册Unit 5 Into the unknown课文ppt课件，共48页。PPT课件主要包含了contents，Homework，Grammar，名词性从句，主语从句，宾语从句，表语从句，同位语从句，形式主语，how等内容，欢迎下载使用。
Grammar: nun clauses
Facing the unknwn
Listening & speaking
Lk at the sentences frm the reading passage and answer the questins.
a. Althugh his thery has been dismissed by schlars, it shws hw pwerful the secrets f Ancient Maya civilisatin are amng peple. b. But the greatest mystery f all is what caused the Maya t abandn mst f their great cities.c. Why Maya civilisatin cllapsed remains a mystery.
Grammar: nun clauses
1. Which sentence cntains a clause that serves as the subject f the sentence?2. Which sentence cntains a clause that serves as the bject f the sentence?3. Which sentence cntains a clause that gives further infrmatin abut the subject in the sentence? 4. What d “hw” , “what” and “why” in each sentence refer t?
1. Which sentence cntains a clause that serves as the subject f the sentence?
Sentence c.
2. Which sentence cntains a clause that serves as the bject f the sentence?
Sentence a.
3. Which sentence cntains a clause that gives further infrmatin abut the subject in the sentence?
Sentence b.
4. What d “hw” , “what” and “why” in each sentence refer t?
a. Althugh his thery has been dismissed by schlars, it shws hw pwerful the secrets f Ancient Maya civilisatin are amng peple.
“hw” refers t the extent f pwer f Ancient Maya civilisatin’s secrets;
b. But the greatest mystery f all is what caused the Maya t abandn mst f their great cities.c. Why Maya civilisatin cllapsed remains a mystery.
“what” refers t the thing that caused the Maya t abandn mst f their great cities;
“why” refers t the reasn that Maya civilisatin cllapsed.
一个句子放于主语的位置上
一个句子放于宾语的位置上
一个句子放于表语的位置上
一个句子放于同位语的位置上
Nw lk fr mre sentences with nun clauses in the reading passage.
1. Based n this, he believed he had sptted an unknwn Maya city buried deep in the jungle.
2. What is mst extrardinary abut these cmplex structures is hw they were built withut the use f wheels, metal tls r even animal pwer.
4. It is pssible that the Maya peple unknwingly reduced their ability t deal with natural disasters.
3. The fact that Maya sciety was technlgically primitive makes its achievements all the mre incredible and mysterius.
怎样使用名词性从句的引导词呢？
原则：缺什么填什么，啥也不缺，填 that, 缺主语，缺宾语，表示“什么人，什么事，什么东西” 用 what。2. 名词性从句都是陈述句语序。
想一想，下列句子应该用什么引导词？是什么从句？（注意从句语序）
1. Althugh his thery has been dismissed by schlars, it shws _______ pwerful the secrets f Ancient Maya civilisatin are amng peple. 2. But the greatest mystery f all is ______ caused the Maya t abandn mst f their great cities.3. _______ Maya civilisatin cllapsed remains a mystery.
4. ______ is mst extrardinary abut these cmplex structures is ______ they were built withut the use f wheels, metal tls r even animal pwer.5. The fact ______ Maya sciety was technlgically primitive makes its achievements all the mre incredible and mysterius.6. It is pssible ____ the Maya peple unknwingly reduced their ability t deal with natural disasters.
Cmplete the passage using nun clauses with wrds in brackets.
There are many mysteries abut dinsaurs t which we lng t find explanatins.Yu may think that dinsaurs were big, green and scaly, right? In fact, it seems that they appeared very different frm 1 _____________ (think).
what we think
In recent years, scientists have wrked ut 2 __________________________________ (lk): many f them were small with feathers. Hwever, 3_______________ (have) feathers still isn’t clear — it might have been fr cmmunicating r fr staying warm, but nt just fr flight. Scientists als believe that many dinsaurs had bright clurs. It seems 4_______________ (depend n) their habitats. That is, dinsaurs which culd fly wuld have had different clurs t thse living in the sea.
what they lked like / hw they lked
whether they had
that depended n
Talk abut what caused the disappearance f dinsaurs using nun clauses where apprpriate. Yu may use the ntes t help yu.
What caused the disappearance f dinsaurs:1. a huge meterite hitting Earth2. ash and gas frm erupting vlcanes3. disease
Amng the many unslved mysteries abut dinsaurs, what really interests me is their disappearance. One pssible explanatin is that …
Wrk in pairs. D research int anther extinct creature. Share yur ideas abut why it disappeared using nun clauses where apprpriate. D further research if necessary.
Read the passage and answer the questins. Pay attentin t the wrds and expressins in bld.
When smething strange r unfamiliar happens, the flight instinct can kick in. Often, making a quick getaway is a sensible and understandable natural respnse, dating back t a time when ur ancestrs were running fr their lives frm dangers, such as wild animals, lightning and fire. S while yu may be tempted t check ut a strange bject r t test the waters f a new situatin, it can be safer t steer clear f the unfamiliar.
Hwever, nt everyne chses t fllw this instinct. Instead f retreating t their caves, sme f ur ancestrs chse t subdue their fears and pursue the unknwn - and this curisity led them t, fr instance, discver the use f fire.
In mre recent times, Nrwegian explrer, Rald Amundsen endured ne f the mst hstile envirnments n Earth when he set ut int uncharted territry t reach the Suth Ple.These reactins help humankind delve int the unknwn and advance twards a mre prgressive and civilised sciety. Of curse, explratin desn’t have t mean blindly thrwing urselves int the unknwn, and it’s never wrng t think twice befre taking actin. While there is n need fr us t shrink frm new situatins,we shuld always lk int things first and cnsider ur ptins.
1. What is the flight instinct? Why d sme peple react that way in the face f the unknwn?
Flight instinct is ur instinctive reactin t get away frm a strange, unfamiliar r dangerus situatin. Sme peple react that way in the face f the unknwn because it is a sensible and understandable natural respnse.
2. What ther reactins culd peple have when facing the unknwn?
Sme peple chse t vercme their fears and face the unknwn.
Put the wrds and expressins in Activity 5 int the table. Add any mre yu can think f.
making a quick getaway
running fr their lives frm
steer clear f
retreating t
test the waters f
taking actin
think twice
cnsider ur ptins
Listening & speaking
Read the passage and answer the questins.
Of all the wrkings f the human bdy, there is ne rgan that prduces the mst intrigue amngst scientists. The brain is the centre f the nervus system and cntrls mst f the bdy’s activities. Interestingly, it is the back part f the brain that is invlved with ur visin. The sides f the brain are invlved in memry, speech and rhythm.
激起……的兴趣；引发……的兴趣
Althugh the brain amunts t nly abut 2% f ttal bdy weight, it uses up t 20% f the bdy’s energy — mre than any ther rgan. Scientists have been cnducting research in rder t seek greater understanding f the brain, especially since the 1950s. Nevertheless, there is still a lng way t g befre we can cmpletely understand the wrkings f this cmplex rgan.
1. What functins f the brain are mentined in the passage?2. What is the current research situatin cncerning the brain?3. D yu knw any ther interesting facts abut the brain? Share them with the class.
1. What functins f the brain are mentined in the passage?
The brain functins mentined include its being the centre f the nervus system and cntrlling mst f the bdy’s activities, including visin, memry, speech and rhythm.
2. What is the current research situatin cncerning the brain?
There is still a lng way t g befre we can cmpletely understand the wrkings f the brain.
3. D yu knw any ther interesting facts abut the brain? Share them with the class.
Listen t the interview and chse the tpic discussed.
1. Methds t keep the brain healthy and active.2. Sleep-related mysteries. 3. Ways f imprving sleep quality.4. Methds f interpreting dreams.
Listen again and cmplete the table.
rest and d maintenance
makes lts f pisnus chemicals
remve these chemicals
remain active
the mst imprtant reasn
New cnnectins are frmed between different parts
uses them t frm new memries
sleep is necessary t this functin
Why d sme peple dream in clur andthers dn’t?
Nw use the infrmatin in the table t give alecture t the class. D further research if necessary.
Cmplete the bxes with the expressins frm the interview.
Culd yu tell us smething abut It’s because ... ... prve that ...
What ther reasns culd there be fr it? Wuld yu tell us mre abut …?
What ther reasns culd there be fr it?
Asking fr mre infrmatin Explaining
Culd yu tell us smething abut ther reasns culd there be fr it?Wuld yu tell us mre abut …?
It’s because prve that …
Wrk in grups. Talk abut the investigatins int anther scientific mystery using the wrds and expressins in this sectin. D further research if necessary.
Nw talk abut hw effectively yu and yur grup have used the wrds and expressins yu have learnt in this sectin and suggest ways t imprve.