unit5 period2 usinglanguage&listening（ppt课件+音频）-2022新外研版（2019）《高中英语》选择性必修第二册.rar

Unit5 A delicate Unit5 A delicate worldworldPeriod 2Using language&ListeningPart1 Grammar:It as an empty objectActivity 2 Rewrite the underlined parts using it as an empty object.Many people think it a good idea to keep this turtle as a pet.believe it no big issue to release them into the wild.people have found it a threat to other species to release these turtles Experts consider it important for owners to keep their pets in notes:59.refer to60.be native to61.threat n.-v.threaten 威胁62.shelter v.庇护，保护;n.庇护所Summary：形式宾语形式宾语 It 基本用法基本用法 it it作形式宾语时作形式宾语时,也可以代替三种形也可以代替三种形式式:不定式不定式、动词动词-ing-ing形式形式和和宾语从句宾语从句。Vt.+it+to dodoing 从句一、it代替不定式短语1.I find it pleasant to work with him.2.They felt it difficult to finish the work in such a short time.3.I think it my honor to be invited to speak here.二、it代替动名词(短语)这只限于少数句型，在多数情况下用不定式时更多一些。1.The professor considers it no good reading without understanding.2.He found it useless(no use)arguing with him.三、三、it代替代替宾语从句从句Eg.He hasnt made it clear when he is coming back.几种特殊情况：1.动词（take,have,put）it+that 从句Eg.I take it that he will finish the task by himself.2.动词(appreciate,enjoy,like,prefer)it+when/if 从句Eg.We really appreciate it if you could do us a favour.3.动词(owe it to sb,take it for granted)that 从句Eg.We owe it to you that we are still alive.几种特殊情况：4.动词短语（look to,depend on,insist on,stick to,answer for）+it+that 从句Eg.She insisted on it that she was innocent.5.动词+it+过去分词从句Eg.He made it known to everyone that he was right.即时巩固即时巩固 单句语法填空1I consider it no use (quarrel)with him about it.2I dont think possible to master a foreign language without much memory work.3Will you see to that the luggage is brought back?4I would appreciate if you would like to teach me how to use the computer.itititquarreling5.The Internet makes it possible _(share)the latest news.6I think my duty to help her.7We all thought it a pity the conference should have been cancelled.8They took for granted that I would be no good at it.ititto sharethatPart2 EcosystemsActivity5 Look at the diagram and answer the questions.Pay attention to the words and expressions in bold.P54 1 What does the diagram show?It shows a food chain the connection between the living things.63.producer 生产者64.consumer 消费者*65.decomposer 分解者Primary consumerSecondary consumer66.absorb ones attention be absorbed in67.dissolve 溶解 68.nutrient 养分69.worm 蠕虫；幼虫wormfungibacteria notes:70.fertilise the soil 使土壤肥沃71.rely on=depend on72.feed on 73.pray on 74.break down 75.take in nutrients76.Producers absorb water and(dissolved)nutrients from the soil.Part2 Ecosystems2 What are the relationships between the living things?P54 The living things are closely connected with each other by _ they eat._ consumers pray on _ consumers,primary consumers feed on _,and _ absorb _ from the sun,and _ and _ from the soil,which are provided by _.the foodSecondary primary producersproducerslightwaterdissolved nutrientsdecomposersActivity6 Complete the passage with the correct form of the words and expressions in Activity5?Part2 EcosystemsP54 absorbrely onfed onprey onbreak downreleasePart3 Listening P55Did you know?77.be in existence 存在的78.decline 下降，减少；谢绝79.pollen 花粉 pollinate 授粉80.nectar 花蜜 honey 蜂蜜Part3 Listening P55Listening materials:1Listening materials:2Listening materials:3Listening materials:45Part3 Listening P55Activity8 Listen again and complete the flow chart.Part3 Listening P55 Activity8 check the answersActivity9 Complete the boxes