资源简介

(共17张PPT)
Unit 5
Working the land
Discover useful structures
- Subject Clause
what is a subject clause
A subject clause refers to the clause that acts as the subject in a sentence. It usually falls at the beginning of the sentence, with a proper conjunction leading the clause according to specific context.
name
function
location
structure
what is a subject clause
That Yuan had realized his dream of seawater rice surprises the whole world.
Rule 1: at the very beginning of the sentence
Rule 2 : using the statement order (conjunction+subject+verb)
Rule 3: subject-verb agreement (主谓一致，一般为单三)
Find out the subject clauses appearing in the text.
tips: 5 sentences
Para: 2/3/4/6
1. However, what concerned him most was that farmers often had poor harvests and sometimes even had a serious shortage of food to eat.
what： 从句中做主语
2. How this could be done was a challenging question at the time.
How： 从句中做状语
Whether： yes/no question 是否
3. However, whether it was possible to develop a hybrid of self-pollinating plants such as rice was a matter of great debate.
4. Today, it is estimated that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan's hybrid strains....
5. What impressed people most about Yuan Longping is his ongoing ability to fulfil his dreams.
Today, that about 60 percent of domestic rice consumption in China is comprised of crops generated from Yuan's hybrid strains...is estimated.
that: 不担当成分，起连接作用
What: 从句中担当主语
The choose of conjunctions
function conjunction
No meaning
Yes or no , cannot use if
Use as subject, object, predictive
Use as attributive
Use as adverbial
that
whether
who/what/wh-ever
Which/whose
When/where/how/why
Fill in the correct leading words
（ )she will win the prize is still unknown.
（ )this could be done was a good question.
（ )she didn't show up remains a puzzle.
（ )some scientists have found hasn't been reported.
（ ) the earth is round is a fact.
whether
how
why
what
that
It is a fact that the earth is round
The others use of “ it ” in subject clauses
It is a pity/a fact/ an honor/… that…
It is good news that he has succeeded.
It is said/reported/believed/…that…
It is reported that he won the election.
It is clear/obvious/likely/…that…
It is not clear whether she failed the exam.
It seems/appears/turns out/ …that…
It seems that it is going to snow.
Task 1 Underline and correct the mistake in each sentence.
(1)What have I forgotten is that I have a test today.
(2)Who left me these flowers are not clear to me.
(3)This is obvious that students should prepare well for their future.
(4) Who’s ticket this is has not been confirmed.
(5)If you will agree with me does matter a lot.
I have forgotten
is
It is
whose
whether
Statement order
Subject-verb agreement
Formal subject
attributive
No “ if ”
Task 2 Make sentences using subject clauses with the help of the cues.
(1)he said/reasonable
What he sad seems reasonable.
(2)she will accept the invitation/not clear
Whether she will accept the invitation is not clear
Task 2 Make sentences using subject clauses with the help of the cues.
(1)he said/reasonable
What he sad seems reasonable.
(3) the animals are moving to/not exactly known
Where the animals are moving to is not exactly known
Task 2 Make sentences using subject clauses with the help of the cues.
(1)he said/reasonable
What he sad seems reasonable.
(4)you have recovered from your illness/a great relief to us
That you have recovered from your illness is a great relief to us
It is a great relief that you have recovered from your illness
Task 2 Make sentences using subject clauses with the help of the cues.
(1)he said/reasonable
What he sad seems reasonable.
(5)he has become distant recently/my concern
That he has become distant recently is my concern
It is my concern that he has become distant recently
Task 2 Make sentences using subject clauses with the help of the cues.
(1)he said/reasonable
What he sad seems reasonable.
(5)he has become distant recently/my concern
That he has become distant recently is my concern
It is my concern that he has become distant recently
Farmers prefer chemical fertilizers to organic ones for an increase of output. But crops grown with chemical fertilizers lack nutrition，essential minerals and nice flavour. Today chemical pesticideshave been in widespread use in farming. Pesticides can kill harmful bacteria and insects，but damage the nutritious crops. This，in turn，affects the animals and humans who digest them.Now some pesticides have been prohibited in most countries. As an alternative，some farmers have switched to organic farming，because organic vegetables and grain are welcomed in urban groceries. These farmers also change crops. For instance，they grow corn or wheat in a field one year，and then grow beans there the next. These crops have entirely different roots and use different depths of soil.
Farmers prefer chemical fertilizers to organic ones for an increase of output. But crops grown with chemical fertilizers lack nutrition，essential minerals and nice flavour. Today chemical pesticideshave been in widespread use in farming. Pesticides can kill harmful bacteria and insects，but damage the nutritious crops. This，in turn，affects the animals and humans who digest them.
为了提高产量，农民更喜欢化 肥而不是有机肥。
但是用化肥种植的作物缺乏营养、必需的 矿物质和美味。
今天，化学农药已在农业中得到了广泛的应用。
农药可以杀死有害的细菌和昆虫，但也会损害有营养的作物。
这反过来又影响到消化它们的动物和人类。

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