外研版 (2019)选择性必修 第一册Unit 5 Revealing nature背景图ppt课件

这是一份外研版 (2019)选择性必修 第一册Unit 5 Revealing nature背景图ppt课件，共24页。PPT课件主要包含了Grammar，Homework，Part 1，Part 2，Part 3等内容，欢迎下载使用。
Integrated skills
Lk at the sentences frm the reading passage andanswer the questins.
1. In sentence (a), which actin happened first, “suspected” r “evlved frm a cmmn ancestr”? “evlved frm a cmmn ancestr” happened first.
2. In sentence (b), which actin happened first, “refused t believe” r “evlved frm lwer frms f life”?“evlved frm lwer frms f life” happened first.
3. What des the structure had dne indicate?It indicates the actin happened befre a certain past actin.
Nw lk fr mre sentences with the past perfect tense in the reading passage, and summarize its use in yur wn wrds.
The persn wh answered the call was nt the captain’s first chice. It was a yung man wh had left medical schl withut cmpleting his degree. had recently received a letter frm his father predicting that he wuld be “a disgrace t yurself and all yur family.2. After Darwin had spent sme time in Suth America, his rm n the ship was crwed with samples f the plants and animals he had cllected.
3. At that time, peple believed that all species had appeared n Earth at the same time, and had nt changed since. 4. It seemed their beaks had evlved accrding t what fd was available n that particular island.5. Over time, it had slwly evlved int many new species.
Past Perfect FrmsThe past perfect is frmed using had + past participle. Questins are indicated by inverting the subject and had. Negatives are made with had nt.Statement: Yu had studied English befre yu mved t New Yrk.Questin: Had yu studied English befre yu mved t New Yrk?Negative: Yu had nt studied English befre yu mved t New Yrk.
1. I ____________(nt see) such a beautiful beach befre I went t Kauai.2. I did nt have any mney because I ________(lse) my wallet.3. Tny knew Istanbul s well because he ___________(visit) the city several times.4. ______ Susan _______(study) Thai befre she mved t Thailand?5. She nly understd the mvie because she _________(read) the bk.6. Kristine _____________(never be) t an pera befre last night.7. We were nt able t get a htel rm because we ______________(nt bk) in advance.8. A: _______ yu ever _______(visit) the U.S. befre yur trip in 2006?B: Yes, I ____________ t the U.S. nce befre.
Hadn’t seen
had visited
had never been
Hadn’t bked
Cmplete the paragraphs with the infrmatin frm the given sentences. The sentences a-c happened in rder. They can help yu t decide the use f tenses.
Cmplete the paragraphs with the infrmatin frm the given sentences.
cmpete decline eatlive intrduce arrive
1. arrived 2. had lived3. eaten 4. had intrduced5. cmpeted 6. declined
Listen t the pdcast and chse the statements that are made.
1. Bidiversity is imprtant.2. Bacteria are always harmful t humans.3. Sme species f bacteria are used in fd prductin.4. Many species f bacteria recycle dead rganic matter.5. Our immune systems are able t fight ff all germs.
Listen again and cmplete the fact sheet.
Discuss what yu knw abut cells and bacteria in pairs.
thirty trillin
thirty-nine trillin
made up f cells
bricks that are used t build huses
help with digestin
D yu knw yu heard f
Cmplete the bxes with the expressins frm the pdcast.
By the fact, f which,…
Checking backgrund knwledge
Adding infrmatin
Answer the questins
1. What species are mentined and what is special abut them? Tw species are mentined:the blue whale and the water bear.The blue whale is the largest animal species n Earth, which cangrw up t almst 30 metres in length and weigh ver 130,000 kils. The water bear is prbably the tughest species, which can survive temperatures frm 150ºC t a belw freezing -272ºC.2. What ther unusual life frms d yu knw f?
is hme t are native t scientific habitats ecsystem appearance primitive ancestr
Cmplete the paragraphs with the crrect frm f the wrds and expressins in the bx.
Wrk in pairs
Lk at the pictures f the species native t different regins f China. Talk abut bidiversity in China using the wrds and expressins in this sectin. D nline research t find mre infrmatin.