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(共47张PPT)
新课标 八年级上册
Unit 10
Section A
3a-3c
If you go to the party, you'll have a great?
学 习 目 标
Objectives
1) 学习掌握下列词汇:
upset, taxi, advice
2）掌握含有if引导的条件状语从句的主从复合句。
3) 能够熟练运用所学的知识，用if来表达条件，用will
来表达结果。
upset
taxi
advice
adj. 难过；失望
n. 出租汽车；的士
n. 劝告；建议
New words
Let's read together!
Revision
Look at the pictures and make sentences with “if”.
If you go to the party with Karen and Anna, you’ll have a good time.
If you wear jeans to the party, the teachers won’t let you in.
Revision
If you take the bus to the party, you’ll be late for school.
If you don’t go to the party, you will be sorry.
Revision
If you have a robot, what will you do?
Lead-in
Free Talk
If I have a robot, I will let it…
I think I’ll take the bus to the party. If you do, you’ll be late.
I think I’ll stay at home. If you do, you’ll be sorry.
What will happen if they have the party today? If they have it today, half the class won’t come.
Should we ask people to bring food? If we ask people to bring food, they’ll just bring potato chips and chocolate.
Grammar Focus
朗读句子
Presentation
1. 我想我将会乘公共汽车去参加聚会。
I _____ I’ll take the bus to the ______.
如果你那样做，你将会迟到。
If you ___ , _____ be late.
2. 我想我将待在家里。
I _____ _____ stay at home.
如果你那样做，你将会觉得很抱歉。
If you ___ , ______ ___ sorry.
Grammar focus
do you’ll
think party
根据课本内容，完成下列句子。
think I’ll
do you’ll be
3. 如果他们今天聚会，将会发生什么事？
_____ ___ _______ if they ____ the party today?
如果他们今天聚会，班里一半的学生将不会去。
If they ____ the party today, ____ the class _____
come.
4. 我们应当要求人们带食物来吗？
Should we ___ people to ______ food?
如果我们请人们带食物，他们将只带薯条和巧克力。
__ we ___ people to bring food, ______ just _____
potato chips and chocolate.
What will happen have
have
half
won’t
ask bring
If
ask
they’ll
bring
语法重点
什么是复合句？什么是主句，什么是从句，什么是条件状语从句？条件状语从句在时态方面有什么特点？
Grammar focus
首先明确概念
(一) if 引导的条件状语从句
Grammar focus
主从复合句：
指的是含有两个或两个以上主谓结构的句子，其中一个主谓结构句子充当另一个句子的某一成分，如主语、宾语、表语、定语、状语、同位语等。
主句：
就是在复合句中起统领作用的句子，它是全句的主体，通常可以独立存在。
从句：
就是在复合句中，充当主句某一成分的句子，作什么成分，就叫什么从句。从句不能独立存在。如：?
You'll feel better after you take the pills.?


主句
时间状语从句
条件状语从句
在复合句中，如果从句用来作主句的状语叫做状语从句，若该从句表示主句动作所发生的前提或条件，则该从句被称为条件状语从句。整个句子称为含有条件状语从句的主从复合句。
Grammar focus
一、条件状语从句的含义
Grammar focus
if 引导的从句在复合句中表示条件，作主句的条件状语，称为条件状语从句，表示假如从句的动作发生，主句的动作就(不)会发生。
二、条件状语从句的引导词
引导条件状语从句最常用的连词是 if (如果;假如) , unless = if ...not，（除非；如果不）。e.g.
1) If you ask him,he will help you.　　
如果你请他帮忙，他会帮你的。
2) If you fail in the exam,you will let him down.　　
如果你考试不及格，你会让他失望的
3) Unless it rains tomorrow, we will go to the zoo.
如果明天不下雨，我们将去公园。
4) Let's go out for a walk unless you are too tired.
如果你不太累，让我们去散步吧！
Grammar focus
三、条件状语从句的位置
条件状语从句既可以放在主句之前，也可以放在主句之后。如果放在主句之前，要用逗号隔开；如果在主句之后，中间不用逗号。e.g.
如果天下雨，我们就不玩了
If it rains, we will stop playing.
We will stop playing if it rains.
Grammar focus
四、条件状语从句的时态
（1）当主句用一般将来时时，if引导的条件状语从句用一
般现在时，我们称之为“主将从现”原则。
If he comes , he will bring his violin.


如果他来，就会带来他的小提琴。


从句
主句
一般现在时
一般将来时
Grammar focus
Johnson won’t answer the phone if he _____ the number.
A. knew B. will know
C. doesn’t know D. didn’t know
典例
C
GRAMMAR
（2）如果主句含有must, may, can等情态动词，if引导的条
件状语从句也用一般现在时。(即主情从现)
If we start now , we can finish the work on time.


如果我们现在开始，就可以按时完成工作。


从句
主句
一般现在时
情态动词
Grammar focus
四、条件状语从句的时态
Grammar focus
（3）如果主句是祈使句，if引导的条件状语从句同样用一般
现在时。(即主祈从现)
Call me if you have any questions．


如果你有任何问题，打电话给我。


从句
主句
祈使句
一般现在时
四、条件状语从句的时态
含有if引导的条件状语从句的主从复合句常与“祈使句＋and/or＋陈述句(表将来)”这一句型进行转换。在该句型中, and表顺承; or表转折，意为“否则”。 If you study hard, you will pass the exam．
= Study hard，and you will pass the exam．
If you don't study hard, you will fail the exam．
= Study hard, or you will fail the exam．
Grammar focus
五、条件状语从句的转换
★当主句是现在的某种时态时，if从句的时态根据实际情况而定。
eg: I don’t know if he will come to school tomorrow.
我不知道明天他是否来学校。
No one tells me if Tom went out last night.
没人告诉我汤姆昨天晚上是否出去了。
拓展【难点】
if 作 “是否”讲, 引导宾语从句的用法。
GRAMMAR
★当主句是过去的某种时态时，if从句要用过去的某种时态。
eg：Lucy asked Tom if he was afraid of dogs.
露西问汤姆他是否害怕狗。
拓展【难点】
if 作“是否”讲, 引导宾语从句的用法。
GRAMMAR
— Celia, join us in the Super Summer Camp if it
_______ this weekend.
— I’d love to. But nobody knows if it _______.
A. is fine; rains B. is fine; will rain
C. will be fine; will rain D. will be fine; rains
典例
B
GRAMMAR
(二) 情态动词should的用法
should作为情态动词，后加动词原形(do)；变否定句时在should 后加not，即shouldn't；变疑问句时，把should 提到主语前。
eg：What should I do if I want to be famous?
如果我想出名，我应该做什么？
GRAMMAR
should的用法：? ?
1. 表示现在或将来的责任或义务,译作“应该”“应当” ,如：
You should do what your parents tell you. ? ?
He should do some work, but he doesn't want to.
2. 用于第一人称疑问句，表征询意见。如：? ?
Should I open the window??我可以开窗户吗？? ?
3. 表推测，暗含很大的可能,译作“可能，该”。如：? ?
It's 4:30. They should be in New York by now.
现在是四点半，他们应该到达纽约了。? ?
GRAMMAR
—Many people play with mobile phones all day instead of reading books.
— That’s too bad. Everyone ____ be a book lover. Reading is more enjoyable.
A. may B. should C. would
典例
B
GRAMMAR
If you go to the party, what clothes will you wear? How will you go? Who will you go with?
Clothes to wear How to go Who go with
jeans take a bus family
A: Will you go to the party next week?
B: Yes, I will.
A: What clothes will you wear?
B: I think I'll wear my jeans.
A: If you do, the teachers won’t let you in.
...
Practice
Dear Su Mei,
I don’t ______ (know) what to ____ (do) about going to Mike’s birthday party tomorrow night. My parents ______ (think) I should study for my English exam next week. If I _____ (go) to the party, they _______ (be) upset. Mike ____ (tell) us to wear nice clothes,but I don’t _____ (have) any. If I _____ (wear) jeans, I ________ (look) the worst. Also, I’m not sure how to ___ (go) to the party. If I _____ (walk) ,
it _________ (take) me too long. If I _____ (take)
the taxi, it _______ (be) too expensive. Can you
give me some advice please?
Tina
Fill in the blanks with the correct forms of the verbs in
brackets.
know
do
think
go
will be
told
have
wear
will look
go
walk
will take
take
will be
Practice
Read 3a quickly and answer the questions.
1. Who wrote this letter?
2. Who is this letter for?
3. Where does Tina want to go?

4. What are the worries?
Tina
Su Mei
Mike's birthday party
What clothes to wear and how to go to the party.
Reading
Language points
1. …, they will be upset.
upset adj. 难过的；失望的；沮丧的
After she died I felt very, very?upset. ?
她去世之后，我非常非常难过。
Marta looked?upset.
玛尔塔一副沮丧的模样。
He was upset over her illness.
他为她的病情而不安。
advice 作“建议”讲时，是不可数名词，而suggestion是可数名词。
一条建议: a piece of advice; a suggestion
一些建议：some advice / suggestions
advice n. 劝告；建议
2. Can you give me some advice please?
【区别】
Language points
advice的常用短语
give sb. some advice 给某人一些建议
give advice on sth. 在某方面给出建议
take/follow sb.'s advice 听从某人的建议
ask sb. for advice 向某人征求意见
Language points
eg: My parents always give me some good advice when I am in trouble.
当我遇到困难时，父母总会给我一些好的建议。
I think you'd better follow your friend's advice.
我认为你最好听从你朋友的建议。
- Could you please offer me some ___ in my research?
- Yes, sure.
A. idea B. message C. suggestion D. advice
D
典例
Language points
1. If I get up late tomorrow,
________________________
2. If I don’t finish my homework,
________________________________
3. If I don’t get enough exercise,
__________________________
4. I will not have enough time to study if
________________________
5. I will not make any friends if
_____________________________
Complete the sentences using your own ideas.
I’ll be late for class.
the teacher will be angry with me.
I’ll not be very healthy.
I watch TV after school.
I don’t go to my friends’ parties.
Writing
1. I will not have enough time to study.
Language points
enough “足够的；足够地”, 既可作形容词,又可作副词。当形容词时，既可以作定语,也可以作表语。作定语置于被修饰的名词前后均可, 前置时强调enough, 后置时强调被修饰词；当副词时,置于被修饰的形容词或副词之后, 常与不定式或介词for连用, 在句子中作状语, 表示程度。 如：
He is old enough to go to school. 他够年龄去上学了。
2. If I don’t finish my homework, ….
Language points
finish “完成”, 是及物动词，其用法是：
1) finish sth. 完成某事。如：
When are you going to finish your work?
你打算什么时候完成你的工作？
2) finish doing sth. 做完某事。如：
He finished reading the book before supper.
晚饭前他把这本书看完了。
If I get up at 9:00, I will be late.
If I am late, my friend will be angry with me.
If my friend is angry with me, I will be sad.
If you go, you will have a good time.
If you do, you will be happy.



My name is " If"
Read together.


I think I will go to the movies tonight. If I go to the movies,
I won’t finish my homework. If I don't finish my homework
…
Write a story with your group on a piece of paper. The first
person begins the story with “I think I will…” The others
add sentences with “if”. Pass the paper around twice. Then
read the story.
Group work
Group Work
I think I will go to the movies tonight. If I go to the movies, I will watch an English movie. If I watch English movies, it can help to improve my English.
If I improve my English, I will get more scores in English test. If I get more scores in English test, I will enter a better senior high school.
A model story
一、根据首字母提示或用所给词的适当形式完成句子
1. I didn’t pass the English exam last week. I was u____ .
2. I missed the last bus so I had to take a t___ to go to school.
3. Can you give me some a_____ on how to learn English well?
4. The teacher won’t let him in if he ______(wear) jeans to the party.
5. As a member of the society, we _________(try) our best to prevent school violence.
pset
axi
dvice
wears
should try
Exercise
Exercise
6. - Can you guess if they _____ to play basketball with us?
- I think they will come if they ______ free.
A. come；are B. will come；will be
C. will come；are D. come；will be
7. Learning to write is learning to think. You will know things more clearly _____ you write them down.
A. or B. unless C. if D. whether
8. If Nick _____ home too late, he ____ his favorite cartoon.
A. gets; misses B. gets; will miss
C. will get; misses D. will get; will miss
C
C
B
Exercise
Exercise
9. - I don’t know if Sam ________ tomorrow.
- Don’t worry. I will tell you when he ______ .
A. comes; will come B. will come; comes
C. will come; will come D. comes; comes

10. If there _____ no buying and selling of animals, there
______ no killing in nature.
　　A. is; will be B. will be; will be
C. is; is D. will be; is
Exercise
Exercise
B
A
Homework
1. Finish the exercises in Workbook.
2. Recite the sentences in Grammar Focus and make
similar sentences.
谢谢
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