资源简介

(共17张PPT)
Unit 5
Working the land
Discover Useful Structures
1.What concerned Yuan most while he was young？
-- What concerned Yuan most while he was young was _____________________________________.
2. What did he choose to study in college
-- ______________________________________________ .
Lead-in
that farmers had poor harvests
What he chose to study was agriculture
1
was one of China’s most famous scientists.
2
4
significantly increased global grain yields.
made him famous
was the poor harvests of farmers.
3
Find out the subject of following sentences.
When a sentence serves as a subject, we call it subject clause, a type of noun clause.
Step 2: Observe and Summarize
Yuan Longping/He
Developing hybrid rice
That he successfully invented hybrid rice
What he was still concerned about
1.That Yuan Longping had realised his dream of seawater rice surprised the whole world.
2.Whether it was possible to develop hybrid rice was unknown.
3. Who will solve the soil problem is unknown.
4.Which one is the best to expand output is unknown.
5. When Yuan would retire to a life of leisure was never mentioned.
6. Where the hybrid rice can be planted is a question.
7. Why Yuan developed seawater rice was to feed more people.
Circle the subject clause and identify the leading words
主语从句用法总结：
1、主语从句一般情况下位于______________________.
2、主语从句要由__________引导，通常置于___________.
谓语动词或系动词之前
连接词
句首
1. That Yuan had realized his dream of seawater rice surprised the whole world.
2. Whether it was possible to develop a hybrid of self-pollinating plants was a matter of great debate.
Underline the subject clauses in these sentences and circle the leading words of the subject clauses:
Step3:Observe and Analyze
是否
不能省略
总结：whether引导主语从句放在句首不能用if替换。
3. What concerned him most was that farmers often had poor harvests.
4. Who will win the competition is still a mystery.
5. Whom you invited is not important.
6. Whose watch was lost was still unknown.
7. Which team will win the competition is difficult to predict.
8. Whoever breaks the law will be punished.
9.What he want to be is a scientist.
Underline the subject clauses in these sentences and circle the leading words of the subject clauses:
what who whom whose which Wh+ever
均有各自的意义
10. When Yuan would retire to a life of leisure was never mentioned.
11. Where the hybrid rice can be planted is a question.
12. Why Yuan developed seawater rice was to feed more people.
13. How this could be done was a challenging question.
Underline the subject clauses in these sentences and circle the leading words of the subject clauses:
Translate and summarize
1.有些人更喜欢住在乡下而非城市的原因是前者生活节奏更慢、生活方式更健康。
That the lifestyle is slower and healthier (be) the reason why some people prefer to live in the country rather than in the city.
2.令很多人担心的是，这些化学制品甚至可能导致癌症。
What worries many people (be)that these chemicals may even cause cancer.
Rule 1: 主语从句作主语时，句子谓语一般用单数
is
is
1.这些小麦农户什么时候会加入预试验仍然不得而知。
When will these wheat farmers join this pilot experiment remains an unanswered question.
When these wheat farmers will join this pilot experiment remains an unanswered question.
2.如何能够找到一个合适的解决办法，在保证环境安全的同时，生产足够的粮食，是一个需要我们研究的重要课题。
How we can find a suitable solution to produce sufficient food while keeping the environment safe is an important topic for us to research.
How can we find a suitable solution to produce sufficient food while keeping the environment safe is an important topic for us to research.
Rule 2: 主语从句用陈述句语序
×
√
√
×
Translate and summarize
That these vegetables can be planted without any soil through this new technology amazed all of us .
It surprised the whole world that Yuan Longping had realized his dream of developing seawater rice.
It amazed all of us that these vegetables can even be planted without any soil through this new technology.
That Yuan Longping had realized his dream of developing seawater rice surprised the whole world.
Rule 3: 形式主语 “it”
It 作形式主语的常见结构：
It is +
well-known
estimated
said
reported
a fact
important
...
+that...
Grandma has been complaining about the vegetables sold in the supermarket, which have been grown using chemical fertilisers. To her, ______ they look beautiful on the outside (be) obvious. However, _______ she is unhappy about is the lower nutritional value and reduced flavour. Now that both of my grandparents have retired from their jobs in the city, ______ they are going to spend their retirement is an important decision for them. __________ they can live a healthy life is the first thing they are considering. So they have made up their minds to move to the countryside, where they can live a green life.
that
what
how
Whether
Instant practice
Practice
is
主语从句
结合句意和句子结构，依据“缺什么补什么”原则确定正确的从属连词，连接代词或连接副词。“缺什么补什么”是指从句缺什么成分
缺主语，宾语，表语，定语 连接代词
缺状语 连接副词
不缺成分 考虑从属连词
Each group uses subject clauses to write a paragraph about your classmates’ qualities and characters.
Production
Discussion
Example
What impresses me most is that Yuan Longping has succeeded in helping to feed so many people. It is important that he never gave up, despite many difficulties. That he succeeded in realising his dream is what makes him great.
Sentence patterns for your reference
It is important that What impress me most is that
What makes him great is that That ...is his most important quality
Whether...depends on How he .... is truly inspiring.
Why he ....is because...
Subject clause
Definition
subordinating conjunctions: that, whether
conjunctional pronouns: who, whom, what,whose, which, wh-ever
conjunctional adverbs: when, where, how, why,
Leading words
Rules
Word order
Subject-Predicate agreement
Formal subject
Summary
1. Write a short passage to introduce a great person like Yuan Longping in at least 30 words, using the subject clauses where necessary.

展开更多......

收起↑