Unit 5 Using language （ppt课件）-2022新外研版（2019）《高中英语》选择性必修第一册.pptx

1、SB1U5 Using languagePast perfectLook at the sentences from the reading Look at the sentences from the reading passage and answer the questions.passage and answer the questions.1.In sentence(a),which action happened first,“suspected”or“evolved from a common ancestor”?2.In sentence(b),which action hap

2、pened first,“refused to believe”or“evolved from lower forms of life”?3.What does the structure had done indicate?“evolved from a common ancestor.”“evolved from lower forms of life.”It indicates the action happened before a certain past action.Now look for more sentences with the past perfect Now loo

3、k for more sentences with the past perfect tense in the reading passage,and summarise its use in tense in the reading passage,and summarise its use in your own words.your own words.1.It was a young man who had left medical school without completing his degree.2.he had recently received a letter from

4、 his father predicting that he would be“a disgrace to yourself and all your family.3.After Darwin had spent some time in South America,his room on the ship was crowed with samples of the plants and animals he had collected.4.At that time,people believed that all species had appeared on Earth at the

5、same time,and had not changed since.5.It seemed their beaks had evolved according to what food was available on that particular island.6.Over time,it had slowly evolved into many new species.Complete the paragraphs with the Complete the paragraphs with the information from the given sentences.inform

6、ation from the given sentences.1.began2.had led to3.developed 4.chose to5.had madeComplete the online encyclopaedia Complete the online encyclopaedia entry with the correct form of the entry with the correct form of the words in the box.words in the box.1 arrived 2 had lived 3 eaten4 had introduced

7、5 competed 6 declinedCompete Compete declinedecline eat eatLive introduce arriveLive introduce arriveudeclinedecline v v.减少减少;衰退衰退 n.n.减少，下降，衰退减少，下降，衰退 decline to.decline to.下降到下降到.decline by.decline by.下降了下降了.decline in.decline in.在在.方面衰退方面衰退/减少减少p decline to do sth.decline to do sth.拒绝做某事拒绝做某事udec

8、laredeclare v v.声明，宣告声明，宣告 declare for/against declare for/against 声明支持声明支持/反对反对udeclarationdeclaration n n.声明，宣告声明，宣告 ublameblame v v.责怪责怪;指责指责;把把.归咎于归咎于 n.n.过失；责备过失；责备 blame sb./sth.for sth.blame sb./sth.for sth.因因.而责备某人而责备某人/事事 balme sth.on sb.balme sth.on sb.把某事怪到某人头上把某事怪到某人头上 be to blame(for.)b

9、e to blame(for.)(因为因为.)应受指责应受指责 (不定式主动表被动不定式主动表被动)Listen to the podcast and choose the Listen to the podcast and choose the statements that are made.statements that are made.Biodiversity1.Biodiversity is important.2.Bacteria are always harmful to humans.3.Some species of bacteria are used in food pr

10、oduction.4.Many species of bacteria recycle dead organic matter.5.Our immune systems are able to fight off all germs.uharmfulharmful adj.adj.有害的有害的uharm v./n.harm v./n.do harm to sb./sth.=do sb./sth.harm do harm to sb./sth.=do sb./sth.harm 对对.有害有害 be harmful to sb./sth.be harmful to sb./sth.对对.有害有害

11、There is no harm in (doing)sth.(There is no harm in (doing)sth.(做做)某事没有害处某事没有害处ufight off fight off 抵抗；击退抵抗；击退Listen again and complete the Listen again and complete the fact sheet.fact sheet.p made up of cellsp bricks that are used to build housesp thirty trillionp thirty-nine trillionp help with d

12、igestionp break downComplete the boxes with the Complete the boxes with the expressions from the podcast.expressions from the podcast.Do you know about.?Have you heard of.?By the way.Actually.In fact,.Speaking of which,Checking background Checking background knowledgeknowledgeAdding informationAddin

13、g informationRead the passage and answer the Read the passage and answer the questions.questions.1.What species are mentioned and what is special about them?2.What other unusual life forms do you know of?Two species are mentioned:the blue whale and the water bear.The blue whale is the largest animal

14、 species on Earth,which cangrow up to almost 30 metres in length and weigh over 130,000 kilos.The water bear is probably the toughest species,which can survive temperatures from 150C to a below freezing-272C.Complete the paragraphs with the Complete the paragraphs with the correct form of the words

15、and correct form of the words and expressions in the box.expressions in the box.1.is home to2.are native to3.scientific4.habitats5.ecosystem6.appearance7.primitive8.ancestor be native to be native to 源于源于.的；原产于的；原产于.be a native of .be a native of .的人；生长于的人；生长于.的动物的动物/植物植物unativenative adj.adj.本地的；本国

16、的本地的；本国的 n.n.本地人；本国人本地人；本国人uThere is no There is no evidenceevidence that that 这里没有证据表明这里没有证据表明.(同位语从句同位语从句)Work in pairsWork in pairsuLook at the pictures of the species native to different regions of China.uTalk about biodiversity in China using the words and expressions in this section.uDo online research to find more information.Thank you