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

这是一份外研版 (2019)选择性必修 第四册Unit 5 Into the unknown优质课件ppt，共32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