人教高中英语必修3 Unit 4 Astronomy: the science of the stars Grammar 课件（共22张PPT）

(共22张PPT)
Unit4 Astronomy:
the science of the stars
Step 1 Lead-in(课堂导入)
(Robbing game)
pull
float
watch out
now that
exhaust
system
violent
break out
exhaust
名词性从句
Noun clause
名词性从句
Noun clause
Step 2 Checking（预习检测）

observe these sentences and judge what clauses are they
No one knows how the earth began.
Lily promised that she would come.
I’m thinking of whether we should go fishing.
This is because you didn’t finish the job.
This place is where I put my bag yesterday.
What is done by night appears by day.
主语从句
表语从句
表语从句
Step 3 Exploring question
（问题探究）
1. What part does the underlined part serve as in each sentence?
1) You are a student.
2) The little girl is so cute.
3) Smoking is bad for you.
4) To find your way can be a problem.
5) How the book will sell depend on its author.
归纳：划线部分在句子中做_______成分.句子的主语可以是_____________________
主语
代词，名词，动词ing形式，不定式，主语从句
2. Try to summarize the rules.
1) That the old building was rebuilt is right.
That he is the best student in the class is obvious.
It is obvious that he is the best student in the class.
2) Whether he will come here is not clear.
It is not clear whether /if she is coming here tonight.
3) Who will do this job doesn’t matter.
What he said is not yet known.
Whatever he said is not true.
4) Where the students will be sent to work is not decided.
Why he was late for school is clear now.
When we will begin the meeting is under discussion.
归纳：
1. 划线句子是_______从句。
2. 位置：___________或__________
3. 语序：_____________________
4. 为了使句子结构平衡, 避免 “头重脚轻”,常把主从移至句末，用_____代替主从放句首。
5. 主语从句放句首，主句谓语动词用_______形式。
单数
主语
句首/句尾
be/vt前
陈述句语序
it
连接词：
1). 连词that 引导主语从句只起引导作用, 本身无实际意义, 在主语从句中不充当任何成分, 但不能省略。
2).表示“是否”用连词_______/_______
放在句首的主从，用__________ 放在句末主语从句，用_________
3）连接代词: ___________________________等。
4)连接副词:_____________________等
whether
if
whether
Whether/ if
What/who/which/whatever
Where/why/when/how
1). 连词that 引导主语从句只起引导作用, 本身无实际意义, 在主语从句中不充当任何成分, 但不能省略。
Step 4 Cooperative learning
（合作交流）
Complete the sentences using what, whether, where,
when, who, why, how or that.
1.( _____ is needed for success) is your hard work. 2.( ___ they will arrive )has been told to the teacher.
3. It is not clear (___we will go shopping tomorrow.)
4.( ______ can join in the sport meet) is decided by the teacher.
5.( ____ it will rain or not) is not clear.
6.( ____ the earth is becoming warm) is a good topic for research.
7.( ___ the sun is rises in the east ) is known to us all.
8...
Step 5 Presentations.
（展示解疑）
1.(_____ is needed for success) is your hard work.
2.(______ they will arrive )has been told to the teacher.
3. It is not clear (______we will go shopping tomorrow.)
4.(______ can join in the sport meet) is decided by the teacher.
5.(________ it will rain or not) is not clear.
What
How
Where
Who
Whether
When
whether
6. (____ the earth is becoming warm) is a good topic for research.
7.(_____the sun rises in the east) is known to us all.
8.(____ you said yesterday) is right.
9. It is clear(____ you didn’t go to see the film.)
10. (_____inspired Chinese most in 2008)was
(_____the Chinese team won the first place in the total number of medals in the Beijing Olympics.)
That
Why
主语从句作主语时，谓语动词一般用单数形式。
Conclusion:
What
that
What
that
Step 6 Feedback
（反馈检测）
What he is a good student is true
You have made a mistake is a fact.
If the policemen will come is not certain.
That he said is true.
What he said are right.
That he needs are more books.
What he needs are more time.
Step 7 Assignment(作业)
1. Recite words and expressions
2. Try to translate the sentences on the learning paper.