人教版 (2019)選擇性必修 第二冊Unit 1 Science and Scientists教學(xué)演示ppt課件

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Unit 1SCIENCE AND SCIENTISTS
T practice the vcabulary.T learn t use predicative clauses.T make sentences using predicative clauses.
Find the wrds frm the previus pages with the fllwing prefixes r suffixes. Then add tw mre wrds fr each prefix r suffix, and explain their meanings.
reunite, revise, recver, react, recall
discver, disappear, dislike, disable
micrscpe,micrwave,micrphne
transfrm, transprt, transplant
acrss, ver, beynd
cntradictry, advisry, cmpulsry
infectin, cntributin, extinctin, reactin, cngratulatin, cllectin
substantial, fficial, financial, cmmercial
epidemilgy, physilgy, bilgy
f r relating t
actin r prcess
having the characteristics f
a branch f knwledge
Make phrases by cmbining the wrds in the left bx with thse n the right. Then cmplete the sentences using these phrases.
1. Many scientists _____________ the view that it is human activity that has caused glbal warming.2. He was t ___________ the accident because he drve n the wrng side f the rad.
subscribe suspect blame link
subscribe t
3. The man _____________ being behind the rbbery was seen crssing the street.4. Since heart disease is ften ___________ ur lifestyle chices, we need t make healthy living an imprtant part f ur lives.
suspected f
It is nt unusual fr an athlete t be well knwn while he is active, and quickly frgtten when his athletic career is ver.2. I'm sure she'll deal with the changes very well because she's very adaptable.
Replace the underlined parts with suitable wrds frm the bx.
a husehld name
raw, a husehld name, substantial, statistics, handle
3. He was ready t serve dinner t his friends when he realised that he had frgtten t turn n the ven and the meat was nt cked yet.4. He used his great influence t change the thinking f the scientific cmmunity n this issue.5. Scientists have cllected mre data than expected t prve the thery.
substantial
UK scientists believe they may have fund a way t fight the cmmn cld. It blcks a key prtein in the bdy's cells that is t _______ fr the spread f cld-causing virus.
Read this passage abut medical science. Cmplete it using the wrds belw.
infectin, multiple, decrease, severe, transfrm, prf, blame, substantial
Targeting the hst rather than the _________ was a bit nn-traditinal but made sense because it was tricky t target the virus. Cld-causing virus are nt nly f _________ kinds, they als ___________ rapidly, meaning they can quickly develp resistance t medicine. Researchers are wrking n making a frm
f medicine that can be taken directly int ne's lungs, t _________ the chance f side effects. Thugh these scientists have made __________ advances in their research, further _______ is needed t make sure such drugs are nt s _________ that they harm the bdy.
The truth was that the water frm the Brad Street pump had been infected by waste.
predicative clause
Underline all the examples in the reading passage where nun clauses are used as the predicative. Then state their meaning and functins.
One thery was that bad air caused the disease. Anther was that chlera was caused by an infectin frm germs in fd r water. It seemed that the wman 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.
在復(fù)合句中作表語的從句叫做表語從句。位于主句的系動詞之后，對主語進(jìn)行解釋、說明，使主語的內(nèi)容具體化。表語從句必須用陳述語序。
e.g. The questin is wh brke the vase. My suggestin is that we (shuld) start early tmrrw.
Predicative Clauses( 表語從句)
狀態(tài)類: be動詞, seem, appear, keep, remain, stay…
變化類: becme, get, turn, grw, fall, cme, g …
感官類: lk, smell, taste, sund, feel …
e.g. The truble is that I have lst his address.The questin is whether they will g by plane r by train.It sunds as if / thugh smene is kncking at the dr.This is because the weather here is cld and wet.That's why Tny gt angry with me. He has becme what he wanted t be ten years ag.The questin is hw we can find the suitable man fr the jb.
1. 表語從句一定要用陳述語序。 e.g. One advantage f playing the guitar is that it can give yu a great deal f pleasure.
2. that引導(dǎo)表語從句時, 在句中只起連接作用, 不充當(dāng)句子成分, 無實際意義, 一般不能省略。 e.g. The truble is that I have lst his address.
3. whether引導(dǎo)表語從句時，起連接作用，意為“是否，空間，到底”，在句中不作任何成分。 if不能引導(dǎo)表語從句。 e.g. The questin is whether yur uncle will ffer help t us.
4. 連接代詞h, whm, whse, what, which, whever, whatever, whichever等除在句中起連接作用外，在從句中還充當(dāng)主語、賓語、表語或定語，本身具有詞義。 e.g. My hmetwn is n lnger what it used t be. The prblem is wh we can get t replace her.
5. 連接副詞where, when, why, hw等除在句中起連接作用，在從句中還充當(dāng)?shù)攸c、時間、原因、方式狀語，本身具有詞義。 e.g. The questin is when they will start the prject. The questin is hw he did it.
6. That is because ...?指原因或理由； That is why ...?則指由于某種原因所造成的后果。 e.g. Bruce did nt watch the game last night. That was because he had t help his little sister with her hmewrk. Bb had seen the film befre. That was why he did nt see it yesterday.
7. 需使用虛擬語氣的表語從句????在advice, suggestin, rder, prpsal等表示建議、勸告、命令等含義的名詞后的表語從句中，謂語動詞需用“shuld +動詞原形”，shuld可省略。 e.g. My suggestin is that we (shuld) start early tmrrw.
Answer the fllwing questins using the infrmatin frm the reading passage as well as the predicative clauses.
What was it that Jhn Snw shwed t the wrld?→What Jhn Snw shwed t the wrld was hw chlera culd be vercme.
1. What was Snw's discvery in tw particular streets in Lndn? Snw's discvery in tw particular streets in Lndn was that ______________________________________ __________________________________.2. What was Snw determined t find ut during the 1854 utbreak f chlera in Lndn? What Snw was determined t find ut was why __________________________________________________________________.
the chlera utbreak was s severe that
the chlera utbreak had caused ver 500 deaths
mre than 500 peple died in ten days
within ten days
3. What were the exact places Snw marked n the map? The exact places Snw marked n the map were where _________________________.4. What was the finding that Snw annunced? Snw's finding was that ________________________ __________________.
all thse wh died had lived
the pump water carried
chlera germs
David is talking t Maria abut their scientific research prject. First cmplete David’s lines (A-E), using the wrds in the bx. Then put David’s lines in the crrect rder and practise the cnversatin.
as if, that, what, wh, when, hw, why, whse, which, whether
A. Abslutely. Yu may nt believe it, but that was ________ happened at the initial stage f ur grup's research n develping a vaccine fr malaria.B. Yes, it is. And it seemed _______ all the theries were useful, but the fact was _____ we culdn't persuade ne anther that ne thery was better than anther.
C. Exactly. The prblem was nt abut ________ all ur theries were equally gd, but in deciding _______ thery t depend upn.D. We realised that what we cared abut was nt _______ aspect we needed t develp a thery in, but rather ______ we can reduce the cst f a vaccine withut reducing its effect!E. Yu're right. At last, we became fcused n the key issue, which was ______ we had t carry ut the research in the first place.
Maria: This mix f thery and data is ne f the key characteristics f what we call science. David: Maria: With yur theretical framewrk?David: Maria: Deciding n a thery is definitely f critical imprtance.
A. Abslutely. Yu may nt believe it, but that was what happened at the initial stage f ur grup's research n develping a vaccine fr malaria.
C. Exactly. The prblem was nt abut whether all ur theries were equally gd, but in deciding whse thery t depend upn.
David: Maria: This was when yu shuld have calmed dwn and gt dwn t ding sme slid wrk.David:
B. Yes, it is. And it seemed as if all the theries were useful, but the fact was that we culdn't persuade ne anther that ne thery was better than anther.
E. Yu're right. At last, we became fcused n the key issue, which was why we had t carry ut the research in the first place.
Maria: S what happened in the end?David:
D. We realised that what we cared abut was nt which aspect we needed t develp a thery in, but rather hw we can reduce the cst f a vaccine withut reducing its effect!
用合適的連接詞補(bǔ)全下面的對話。Tm: Hi, Jane. I want t becme a scientist. My questin is ________ scientists wrk and what I need t d in rder t becme a scientist. First f all, I'd like t knw hw lng I have t study t becme a scientist.
Jane: Well, that depends. Usually, a scientist must have at least a Bachelr's degree, s that means abut fur years in cllege. Nwadays, mst scientists need a Master's degree, t.Tm: My secnd questin is ________ curses r majr shuld I chse.
Jane: Again, that depends n what yu want t study in the future. Yu will need t study maths. If yu want t be a successful scientist, yu must understand the basics f physics, chemistry and bilgy.Tm: Ww, that's a lt. What puzzled me was ________ branch f science I shuld chse?
Jane: Well, I think the best way is ______? yu shuld get sme practical experience. Visit scientists and labratries t see what the life f a scientist is like. Ask scientists t tell yu abut their wrk. Yu shuld als try t find ut which branch f science yu like and are gd at.Tm: I like physics, but the questin is _________ my parents will allw me t majr in it.
Jane: That's unbelievable. My first advice is ________ yu shuld make yur wn decisin.Tm: I think s. D yu have any ther advice fr me?Jane: Yes. I think a gd scientist shuld be careful, curius and creative and that he r she shuld like t ask a lt f questins and slve prblems.
Review the wrds, expressins and sentences we have learned.Review Grammar.3. Finish the exercises in the wrkbk.