Unit 6 At one with nature Understanding ideas Longji Rice Terraces课件 (共10张PPT)外研版（2019）必修第一册

(共10张PPT)
Longji
RiceTerraces
Do you know where are the places in the pictures
The Dangerous Terraces of Taihang Mountains
In central China's Taihang Mountains, there are special terraced fields 1.________ (call) "cliff terraces". Unlike other famous terraces in China, these are built on steep cliffs 2.__________ farmers face real danger while 3.__________ (work).
These terraces climb up mountains with height differences of over 800 meters. Some fields stand right above deep valleys. The paths 4.___________ fields are very narrow - less than half a meter wide. When it rains, they become slippery and 5. ___________ (danger). Local people began building these terraces during the Ming and Qing dynasties, 6. _________ (use) simple tools like iron chisels and ropes. Even today, farmers continue 7. _________ (grow) crops like corn and millet here, carrying their tools up dangerous paths. They are often called "cloud farmers".
The most famous spot is Guoliang Village, where the terraces and 8.______ amazing tunnel road show how local people never give 9.______ despite difficult conditions.
These terraces are not just beautiful - they tell a story of human courage and hard work in one of China's most 10. ____________ (challenge) landscapes.
called
where
working
between
dangerous
using
to grow
an
up
challenging
Choose the author’s purpose in writing the passage.
1 To praise the wisdom of the ethnic groups living in Guangxi Zhuang Autonomous Region.
2 To explain how people worked in harmony with nature to create the Longji Rice Terraces.
3 To describe the beauty of the Longji Rice Terraces and to attract visitors to this scenic spot.
Look at the sentences from the reading passage and answer the questions.
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.
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 changing the meaning
_________________________________________________________
the areas
the local people
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 visit this cultural 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.
__________________________________________________________
The Zhuang is an ethnic group of which the population is the largest of all ethnic groups in China.
Guangxi is a province in which the Longji Rice Terraces are located.
I want to visit this cultural landscape to which the title of UNESCO World Heritage Site was given in 2016.
He is an expert on rice planting from whom the local Zhuang people have learnt a lot.
关系代词的用法
在定语从句中，关系代词起着连接主句与从句、指代先行词和在从句中作句子成分的三重作用。关系代词的选用取决于主句中的先行词以及关系代词在从句中作何种成分。
先行词 在从句中作主语 在从句中作宾语 在从句中作定语
指代人 who/that whom/who/that whose
指代物 which/that which/that whose/of which
Do you know Peter + His father happens to be working in your company.
Do you know Peter whose father happens to be working in your company
2.关系副词词的用法
关系副词和关系代词一样，具有各种作用：在定语从句中代替先行词、在从句中作状语、把两个句子连接成为一个带有定语从句的主从复合句等。由于关系副词在从句中均作状语，所以具体选用什么关系副词，主要取决于关系副词在从句中充当什么类型的状语。
先行词 关系副词 关系副词在从句中充当的句子成分
指地点 where 地点状语
指时间 when 时间状语
指原因 why 原因状语
点睛：关系代词和关系副词的选用
对于同一个先行词，要想确定是用关系代词还是用关系副词，关键是要弄清楚关系词在定语从句中担任什么成分。如果关系词在从句中作主语或宾语，就是关系代词；如果关系词作状语，就是关系副词。
①This is the college (that/which) I visited.
②This is the college where I studied three years ago.
3.介词+关系代词的用法
① 先行词指人关系代词用whom，指物关系代词用which；
② 介词选择的原则：一看先行词特殊搭配，如to a degree；二看从句谓语动词搭配，如learn from；三看整个语境逻辑。特殊结构如in which case, with whose help等。
This is the pilot by whom my son was saved.
（介词+关系代词中，先行词指人用whom）
This is the camera with which he often takes photos.
（介词+关系代词中，先行词指物用which）
I don’t know the reason for which he was late for school.
（定语从句先行词reason多与介词for连用）
Is this the car for which you paid a high price
（定语从句谓语动词pay for是固定搭配）
Complete the passage with a preposition + whom / which.
Among the many beautiful treasures people 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 returning 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 by using natural dyes, we can remind ourselves of nature’s beauty and protect the natural world.
from which
in which
for which
for whom