2021版外研版必修一英语Unit 6 Using Language P65 ppt课件.pptx

1、Using language P65 新新外研必修外研必修Book 1 Unit 6 At one with nature 读课文读课文，找找出出含有含有介词加关系代词介词加关系代词等引导的定等引导的定 语从句语从句的句子的句子。 1. But perhaps what is most significant is the way in which people have worked in harmony with nature to make these terraces and grow rice. 2. This forms clouds from which rain falls d

2、own onto the mountain terraces once again. Look at the sentences from the reading passage and answer the questions. Questions 1 What do which and whom refer to in each sentence? 2 Why do we use prepositions before which and whom ? 3 In sentence (a), can we replace in which with where without changin

3、g the meaning? a .they could increase the areas in which they could grow rice. b .these terraces still mean a lot to the local people for whom traditions hold much value. Because which and whom serve as the object of the action phrases that end with a preposition. Yes a .they could increase the area

4、s in which they could grow rice. b .these terraces still mean a lot to the local people for whom traditions hold much value. c .they could increase the areas. They could grow crops in these areas. d .these terraces still mean a lot to the local people. Traditions hold much value for them. Whats the

5、difference between the two groups of sentences? Sentences (a) and (b) both contain a clause defining a noun in the sentence. Sentences (c) and (d) are constructed with a pair of simple sentence, with one defining a noun in the other sentence in each pair. Why does the author choose to use sentences

6、(a) and (b) in the reading passage? Because there is a closer link and connection between the item and the clause defining it in sentences (a) and (b). It will also make the passage clearer, and create an emphatic effect on the objects being defined. Attributive clauses 当关系代词在定语从句中作介词的宾语 时，通常用“介词+关系

7、代词”引导定语 从句，且关系代词不能省略。 例1： The man by whom the thief was caught was a good policeman. 那个抓住小偷的男人是个优秀的警察。 当先行词是表人的名词或代词时，介词后 的关系代词用whom，不能用who。 例2：This is the reason for which I was praised by my chemistry teacher. 这就是我得到化学老师表扬的原因。 先行词是表事物的名词或代词时，介词 后的关系代词要用which，不能用that。 例3：The city in which she lives

8、 is far away. 她居住的城市非常遥远。 介词选用的原则介词选用的原则 根据主从句之间的意思确定所需介词。 例1： This is the book _ which I got the story. 由于句意含有“从”的意思，所以用 介词 from。 from 根据从句动词、形容词等构成的短语确 定所需介词。 例1：Tom is the very person _ I will turn when in trouble. 根据题干大意，从句意为“我遇到困难可以 求助的人”。“求助”即turn to，又因先 行词指人，故答案为to whom。 to whom 根据先行词确定所需介词。

9、此时“介词+关系代词”结构往往可以和关 系副词互换。如： when=表时间的介词(in, at, during等)+which where =表地点的介词(in, at, on, under等) +which; why=表原因的介词 for+ which 例1：I met the child (whom) I looked after ten years ago. 我遇到了十年前我照料过的那个孩子。 例2：This is the book (that/which) you are looking for. 这是你正在找的书。 含有介词的动词固定短语在定语从句中一般 不拆开，在这种情况下，介词仍

10、然放在后面， 如 hear from，look after， look for等。而在 介词处于句尾时，句中的关系代词可以省略。 Connect the sentences with a preposition + whom/ which. 1 The Zhuang is an ethnic group. Its population is the largest of all ethnic groups in China. 2 Guangxi is a province. The Longji Rice Terraces are located in it. 3 I want to visi

11、t this cutural landscape. The title of UNESCO World Heritage Site was given to it in 2016. 4 He is an expert on rice planting. The local Zhuang people have learnt a lot from him. 1 The Zhuang is an ethnic group of which the population is the largest of all ethnic groups in China. 2 Guangxi is a prov

12、ince in which the Longji Rice Terraces are located. 3 I want to visit this cutural landscape to which the title of UNESCO World Heritage Site was given in 2016. 4 He is an expert on rice planting from whom the local Zhuang people have learnt a lot. Answers: Among the many beautiful treasures people

13、can receive from nature are natural dyes. The most common natural source 1 natural dyes come is plants. Materials for making natural dyes can often be found in gardens 2 colourful flowers are planted. Other natural dyes are made from insects,sea creatures and mineral compounds.Natural dyes are now r

14、eturning to popularity, especially with artists and craftspeople. The reasons 3 _ they prefer natural dyes are that the colours are brighter and can be kept longer. Natural dyes are also becoming more popular with consumers 4 _caring for the environment is a priority. More and more people feel that

15、by using natural dyes, we can remind ourselves of natures beauty and protect the natural world. from which in which Complete the passage with a preposition + whom/ which. for which for whom Exercises Complete the sentences with preposition+ whom or preposition+ which. 1. Wind power is an ancient sou

16、rce of energy _we may return in the near future. 2. Gun control is a subject _Americans have argued for a long time. 3. He was educated at a local grammar school, _ he went on to Cambridge. 4. There are species living in the depths of the oceans _ we still know little. to which about which after whi

17、ch of which 5. Todays English learners have a wide choice of dictionaries _to choose. 6. A good advertisement often uses words _ people attach positive meanings 7. The position, however, _ you are applying, is not quite a well-paid one. 8. In the end, it was Becky _ he turned for a gentle word and a smile. 9. American women usually identify their best friend as someone they can talk frequently. 10.In our class there are 46 students, _ half wear glasses. from which for which to whom to which with whom of whom Thank you!