(共29张PPT)
主语从句
之要义详析
一、主语从句是名词性从句的一种，在复合句中作主语，相
当于名词。主语从句的位置可以在句首，也可以用t
作形式主语，主语从句放在后面。
二、主语从句的引导词
l.连词that、whether,在主语从句中不充当任何成分，
只起连接作用，不可省略，其中that没有词义，whether
表示“是否”含义，但是不能换成f(如果)。
2.连接代词what、who、which,在主语从句中充当主
语、宾语、表语，不可省略。
★即学活用语法填空
①(2ol7·全国卷I)What I'm hoping to accomplish is
that my generation and younger start to reconsider and
understand that jazz is not black and white anymore.
2Whether he will attend the meeting or not doesn't matter.
他是否参加会议并不重要。
3That he survived the serious traffic accident was a
wonder.
他在那次严重的交通事故中幸存下来是个奇迹。
三、t作形式主语的主语从句
在主语从句中如果主语太长，宾语或表语又太短，为了
避免头重脚轻，保持句子平衡，通常会采用t作形式主
语，真正的主语从句放在后面。
常见的使用t作形式主语的结构：
It is said/reported/believed/well known that...
It is a pity that...
It is probable that...
It happened that...
四、主语从句的语序时态问题
主语从句和其他名词性从句一样必须使用陈述语
序，尤其是当主语从句是疑问词引导的时候，主语从句
的语序仍须使用陈述语序。
Who/Whom he will go to Beijing
with
remains
unknown.
他将和谁一起去北京还不知道。
主语从句的时态根据具体语境来确定，尤其是当when
引导主语从句的时候，有些同学会和when时间状语从
句混淆而误用现在时表将来。
When he will come back is still unclear.
他什么时候回来还不清楚。(共52张PPT)
I.单词拼写
l.shortage(不足)of
2.tackle(解决)this crisis
3.boost(使增长)yields in the fields
4.Chinese characteristic(特色)
5.convince(使确信)sb.of sth..
6.attain(获得，得到)one's goal
7.conventional(传统的)opinions
8.assumption(承担)of responsibility
9.intense(不懈的)effort
lO.overcome(克服)difficulties
1l.expand(增加)output
l2.it is estimated(估计)that
l3.domestic(国内的)markets
Ⅱ.根据语境填入适当的介词或副词
1.He decided to devote the rest of his life to scientific
work.
2.The project team is comprised of the people who have
assigned roles and responsibilities for completing the
project.
3.Deep down they realize that happiness can't be bought,
but it can be shared.
4.It was the first time I had set foot on African soil.
5.The enemies are fierce in appearance but very weak in
reality.
lI.Skim the passage and find the structure of the
passage
Part I.Yuan's 1.self-assessment.
Para.1 He considers himself a farmer.
Para.2 Why did he decide
to study agriculture
PartⅡ.Yuan's
Para.3 Yuan succeeded in
2.contribution
developing hybrid rice.
A PIONEER FOR
ALL PEOPLE
Para.4 Yuan's contribution
to the world.
Para.5 Yuan's indifference to
PartΠ.3.Overall
fame and fortune.
assessment of
Yuan.
Para.6 Yuan remains true to the
original aspiration.(共143张PPT)
I.根据语境及汉语提示写出正确的单词
l.chemical(化学的)change
2.alleviate(减轻)the sufferings
3.out of poverty(贫穷)
4.organic(有机的)farming
5.a widespread(分布广的，流行的)disease
6.digest(领会)the contents of the book
7.smoking is prohibited(禁止)
8.food is essential(极其重要的)to life
9.alternative(可替代的)energy
l0.agree entirely(完全地)
Ⅱ.根据语境选择适当的短语填空
in addition,in turn,
because of,as for,as well,
for instance
1.I'll do some reading for fun,and for knowledge as well.
2.Theory is based on practice and in turn serves practice.
3.I met some friends and other acquaintances in addition.
4.As for parents,nothing can be compared with their
children's physical and mental health.
5.There are jobs more dangerous than truck driving;for
instance training lions.
6.Because of the help you gave me that summer,my life
changed.
Ⅱ.文本细节理解：探寻语篇细节信息
1.Why did many farmers welcome the introduction of
chemical farming
A.They can fight crop disease and increase production.
B.They harm both the land and people's health.
C.They can help produce rich soil.
D.They are not expensive.
2.What concerns many people about the use of pesticides
A.Pesticides can damage the land.
B.Chemicals can stay in the soil for a long time.
C.Pesticides can kill harmful bacteria and insects.
D.Chemicals may make people ill and even cause cancer.
