高中英语 选必B5U5-第三课时-using language 课件

1、高一英语深圳市教育科学研究院2021年深圳市春季深圳市线上课程教学材料：外研版高中英语新教材选择性必修第二册教学内容：Unit 5 It as an empty object 第三课时：Using Language执教人：王逸聪/深圳市罗湖区罗湖高级中学It as an empty objectIt 作形式宾语1 What does “it” refer to in sentences (a) and (c)?No visitor would think it surprising that the island is a UNESCO World Heritage Site.No visit

2、or would think that the island being a UNESCO World Heritage Site is surprising.Experts felt it necessary to come up with a plan to remove all the rabbits from the island.Experts felt to come up with a plan to remove all the rabbits from the island was necessary. 2 What is the difference between the

3、 sentences in each group?When the object of a sentence is a that-clause (b) or a to do infinitive (d), we sometimes use “it” as an empty object and put the real object later to keep balance. For example, sentence (a) uses “it” as the empty object of “think”, referring to the real object: “the island

4、 is a UNESCO World Heritage Site”. Sentence (b) uses that-clause as the object of “think”.No visitor would think it surprising that the island is a UNESCO World Heritage Site.No visitor would think that the island being a UNESCO World Heritage Site is surprising.Experts felt it necessary to come up

5、with a plan to remove all the rabbits from the island.Experts felt to come up with a plan to remove all the rabbits from the island was necessary. it 作形式宾语 it 作形式宾语时， 可以代替三种形式：不定式（短语）、动名词（短语）和宾语从句。it 作形式宾语时， 需具备两个条件： 1. 真正的宾语是不定式、动名词或从句。 2. 有宾语补足语具备了这两个条件，使用形式宾语it来代替真正宾语，而真正宾语放在句子末尾，保持句子结构的平衡性。1 it

6、代替不定式（短语） 当不定式（短语）在复合宾语结构中作某些动词（如think, make, find, consider, feel, suppose等）的宾语时。I find it pleasant to work with him.They felt it my honor to be invited to speak here.2 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。The professor considers it no good reading without understanding.Do you consider it any goo

7、d trying again?He found it useless(no use) arguing with him.3 it 代替宾语从句1）某些表示“喜，怒，哀，乐”的动词， 如like, enjoy, love, hate, appreciate等，往往不能直接接宾语从句，而是先用it作形式宾语，再把真正的宾语从句放在后面。I dont like it that hes so lazy.I hate it when my mother asks me to eat eggs.We would really appreciate it if she offered to help .th

8、at引导的宾语从句不能直接作介词的宾语， 而是先用it作形式宾语，再把真正的宾语从句放在后面。常见于某些动词加介词的短语中， 如depend on , rely on , see to(注意), stick to(坚持), answer for等。You may depend on it that we shall always help you.Would you see to it that she gets home early?She insisted on/ stick to it that she was innocent.3)由及物动词与介词组成的固定搭配中， 宾语从句若作该动词

9、的宾语时， 须借用it，并把句子中真正的宾语放在句尾.I leave it to your own judgement whether you should do it.We owe it to you that there wasnt a serious accident.I took it for granted that they were not coming.4)当从句在复合宾语结构中作某些动词（如think,make, find等）的宾语时。Britons found it pleasant that they worked with us Chinese.5) 动词+it+过去分

10、词+从句He made it known to everyone that he was right.1 I consider it no use _(quarrel) with him about it .2 I dont think _ possible to master a foreign language without much memory work.3 Will you see to _ that the luggage is brought back?4 I would appreciate _ if you would like to teach me how to use

11、 the computer.5 The Internet makes it possible _(share ) the latest news.6 I think _ my duty to help her.7 We all thought it a pity _ the conference should have been cancelled.8 They took _ for granted that I would be no good at it . quarreling it it it to share it that it直击高考1 孩子们觉得和父母在一起是安全和幸福的。Ch

12、ildren feel it safe and happy to be with their parents.2 我发现很难与她相处。I find it hard to get along with her.3 现代技术使得在太空飞行成为可能。Modern technology has made it possible to fly in space.4 大雨使我们更难按时完成工作。The heavy rain made it more difficult for us to finish the work on time.5 我们认为向他解释清楚发生了什么事没有用处。We thought i

13、t no use explaining to him what happened.translationmany people think it a good idea to keep this turtle as a petbelieve it no big issue to release them into the wildpeople have found it a threat to other species to release these turtles into the wildExperts consider it important for owners to keep

14、their pets in an enclosed areaRewrite the underlined parts using it as an empty object.e.g. I think it a breakthrough to transform a desert into a forest.Look at the pictures of the Saihanba National Forest Park and describe its changes using it as an empty object where appropriate.1960spresent dayn

15、ouns/adjectivesbreakthrough impossible likely unrealisticto do /thatinvestigate plant trees transform EcosystemsProducers absorb water and dissolved nutrients from the soil. They also make their own food by absorbing light from the sunPrimary consumers rely on vegetation to provide energy. They feed

16、 on green plants.Secondary consumers prey on primary consumers as well as eating other animal matter.Decomposers break down dead animals and vegetable matter into nutrients. The dissolved chemicals are then released back into the food chain, to be used by producers.Look at the diagram P54 and pay at

17、tention to the words and expressions in bold.What does the diagram show? 2. What are the relationships between the living things?The living things are closely connected with each other by the food they eat. Secondary consumers prey on primary consumers, Primary consumers feed on producers, and produ

18、cers absorb light from the sun,and water and dissolved nutrients from the soil, which are provided by decomposers.The diagram shows a food chain the connection between the living things.Look at the diagram P54 and answer the questions.Complete the passage with the correct form of the words and expre

19、ssions in activity 5. In a woodland ecosystem, trees and other plants are producers. They 1_ water, and take in nutrients from the soil and energy from the sun. Insects are an example of a primary consumer. They 2_ the producers to provide food for them, and are 3_ by secondary consumers: small mamm

20、als and birds. They 4_ the primary consumers. Fungi and bacteria are decomposers. They 5_ animal waste and the remains of living things. The chemicals these decomposers 6_ fertilise the soil and give the plants the nutrients they need to grow. absorb rely on fed on prey on break down releaseOne of t

21、he oldest species in the ecosystem, the honey bee has been in existence for millions of years.A honey bee can fly as fast as 24 kilometres per hour and its wings can beat 200 times per second.In just one journey to collect pollen and nectar , one single honey bee can pollinate as many as 50 to 100 flowers.Did You Know?Listen to the conversation and choose the true statements .Bees are ver