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人教版八年级上册
Section A2d&Grammar Focus
精选公开课
Unit 10 If you go to the party, you’ll have a great time.
学习掌握下列词汇： potato chips, chocolate, upset, taxi, advice
掌握正确用含if条件状语从句的主从句。
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。
学习因果关系的表达和做出合理的建议。
Learning objectives
Let’s enjoy a song.
Warming-up
Let's sing and dance together!
If you're happy and you know it clap your hands
If you're happy and you know it clap your hands
If you're happy and you know it and you really want to show it
If you're happy and you know it clap your hands
If you're happy and you know it stamp your feet
If you're happy and you know it stamp your feet
If you're happy and you know it and you really want to show it
If you're happy and you know it stamp your feet
If you're happy and you know it shout “Hurray”
If you're happy and you know it shout “Hurray”
If you're happy and you know it and you really want to show it
If you're happy and you know it shout “Hurray”
Play
a game!
If it is rainy tomorrow,
what will you do
I will stay at home
if it is rainy tomorrow.
Play
a game!
If you stay at home,
what will you do
I will listen to music if I stay at home.
Play
a game!
If your friends invite you to the party, who will you go with
I will go to the party with my best friends, Joe and Luke.
Play
a game!
If you go to the party with your best friends, how will you go to the party
We will go to the party by bus.
Play
a game!
If you go to the party, what clothes will you wear
I will wear my favourite jeans.
Jeff and Ben is going to organize a party.
How will they prepare for it
When
Where
Who
Food
Games
others
...
In the music room...
all the classmates
drinks,fruit and snacks...
share stories,talent show,...
...
Let's see what they are talking about.
New drills:
Read 2d carefully and answer the questions.
1.What are Jeff and Ben talking about
2.Will Ben and Jeff ask people to bring food for the party
3.What will happen if Ben and Jeff ask people to bring food
Food and games for the party next week.
No, they won’t.
They’ll just bring potato chips and chocolate because they’ll be too lazy to cook.
4. So what will Ben and Jeff do
5.For the games, will they give people some small gifts if they win
6.What will happen if we give people some small gifts if they win
Yes, they will.
If they do so, more people will want to play the games.
They will order food from a restaurant.
Jeff: Hey, Ben. For the party next week, should we ask people to bring food
Ben: No, let’s order food from a restaurant. If we ask people to bring food, they’ll just bring potato chips and chocolate because they’ll be too lazy to cook.
Jeff: Ok. For the games, do you think we should give people some small gifts if they win
Ben: I think that’s a great idea! If we do that, more people will want to play the games.
Jeff: Yes, the games will be more exciting, too.
order…from…从…预定
too…to…太…而不能…
Listen and repeat.
2d
Language points
1.If we ask people to bring food, they’ll just bring potato
chips and chocolate…
ask sb. to do sth. 请求/要求某人做某事
ask有关的短语还有：ask for help/ sth. 请求帮助/要求某事物
ask sb.in/out 邀请某人进来/出来
ask sb. about sth. 询问某人关于某事
例：他请求医生告诉他真相。(翻译)
_________________________________
He asked the doctor to tell him the truth.
2....because they’ll be too lazy to cook.
“too+形容词/副词+to do sth.”表示“太……而不能……”。在形式上是肯定结构，但表达的却是否定意义。too后接动词原形。
拓展：too…to…可与not…enough to do（不够…而不能）以及so…that…（如此…以至于…）进行同义转换。
例： 他太小了，不能去上学。(翻译)
_________________________________
_____________________________________
_____________________________________
He is too young to go to school.
He is not old enough to go to school.
He is so young that he can’t go to school.
3.the games will be more exciting, too.
【辨析】　exciting,excited
exciting令人兴奋的,用于形容感情方面影响他人的人或事,主语一般是物或用来修饰物,在句中作表语或定语。
excited为形容词,表示“兴奋的”,多指人受到事物的影响,主语一般是人或用来修饰人,在句中作表语。
例： Are you ______ about going to Beijing
你要去北京了，感到兴奋吗？
He told us an _____________ yesterday.
他昨天给我们讲了一个使人激动的故事。
excited
exciting story
类似的还有：bored/boring;
suprised/suprising;
interested/interesting...
Ben and Jeff are planning for the party ________. The won’t ask people to bring food. ___ they ask people _______ (bring) food, they ________ (bring) potato chips and ________ because they ______ too lazy to cook. So they will _____ food from a restaurant. For the games, Ben thinks that they should give people some small gifts ___ they win. ___ they do that, _____ people ________ to play the games and the games will be ____________.
Fill in the blanks according to the conversation.
will want
more exciting
more
order
to bring
will bring
if
If
If
will be
next week
chocolate
Consolidation
Hey, Ben. For the party..., should we...
No, Let's order...from...
If..., they'll...
......
......
Role play
Role-play the conversation.
Grammar Focus
I think I'll take the bus to the party. ____ you do, _______ be late.
I think I'll stay at home. ____ you do, _______be sorry.
What ____happen ____they have the party today ____ they have it today, half the class _______come.
Should we ask people to bring food _____we ask people to bring food, ______ just bring potato chips and chocolate.
you'll
If
you'll
If
won't
If
they'll
If
will
if
If you do, you’ll be late.
If you do, you’ll be sorry.
If they have it today, half the class won’t come.
If we ask people to bring food, they’ll just bring potato chips and chocolate.
从句
主句
如果……, 将……
一般现在时
一般将来时
If you do, you’ll be late.
If you do, you’ll be sorry.
If they have it today, half the class won’t come.
If we ask people to bring food, they’ll just bring potato chips and chocolate.
简单句
简单句
If
If 是连词，意思是如果；假若；倘若
通常表示假设，表示将会发生和可能发生的事，或进行提醒警告。
类别 构成 例句
简单句 The Simple Sentence 一个主语（或并列主语）+ 一个谓语（或并列谓语） I get up at six.
My mother and I often go shopping.
Some students walk or ride bikes to school.
复合句 The Complex Sentence 一个主句 + 一个/多个从句 What do you want to be when you grow up
I think (that) Screen City has the most comfortable seats.
句子的类型
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.
If you take the bus to the party, you’ll be late.
If you stay at home, you’ll be sorry.
为避免重复,条件状语从句常用助动词do(does/did)来替代上文所提到的动作。
What did you find out
If是连词，表示假设或条件，意思是“ 如果…的话”，通常表示假设，表示将会发生和可能发生的事，或进行提醒警告。
if条件状语从句的定义：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。
if条件状语从句的位置：
if引导的条件状语从句既可以放在主句前，也可以放在主语后，若if从句在主句前，用逗号与主句隔开；若if从句在主句后，中间不用任何符号。
语法重点 if引导的条件状语从句
句子结构：If+从句main clause，主句。=主句+if+从句 。
（从句谈论可能的活动，主句谈论可能的结果）
It will be sunny tomorrow.
We will have a trip tomorrow.
We will have a trip if it is sunny tomorrow.
If it is sunny tomorrow, we will have a trip.
主句在前从句紧跟其后
从句在前时，用“,”与主句隔开
If引导的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。 (即主将从现)
注意：if引导的条件状语从句通常不用一般将来时。
If he _____ (get) up late,he_____ (be) late for school.
如果你想聊天，打我电话。
If it_____ (rain) tomorrow，I _________ (stay) at home.
如果明天下雨，我将呆在家里。
改同义句：
He will be late for school if he gets up late.
I'll stay at home if it rains tomorrow.
gets
will be
rains
will stay
2.如果主句是祈使句，那么从句通常要用一般现在时the simple present tense。 (即主祈从现)
If you _____ (want) to have a chat ,_____ (call) me up.
如果你想聊天，打我电话。
__________ (not wait) for me if I _____ (be) late.
如果我迟到，就别等我。
改同义句：
want
call
Don't wait
am
Call me up if you want to have a chat.
If I am late,don't wait for me.
注意：if引导的条件状语从句通常不用一般将来时。
3.如果主句是含有must，can，may 等情态动词时，根据需要从句多用一般现在时the simple present tense。(即主情从现)
You can _____ the exam if you _____ (work) hard.
如果你努力学习，你就能通过这次考试。
You must _____ if the traffic light ____ (be) red.
如果交通灯是红色，你必须停下来。
改同义句：
pass
work
stop
is
If you work hard,you can pass the exam.
If the traffic light is red,you must stop.
注意：if引导的条件状语从句通常不用一般将来时。
4.表示真实条件、客观真理、自然现象、定理定义、 民间谚语等，句型是：If + 句子 （一般现在时 ），+ 主句 （ 一般现在时）.(即主现从现)
必然的结果
the result that will certainly happen
如果温度低于零摄氏度, 水就会变成冰。
If the temperaturet____ below zero, water ____ (turn) into ice.
=Water ____(turn) into ice if the temperature____below zero.
is
turns
turns
is
if 条件句不一般，几个要点记心间；
条件句，放在前，逗号要居中间；
条件句表可能，主句多用将来时；
条件句表事实，主句常用现在时。
注意：
1.if还可以用于宾语从句中，表示“是否”，相当于 whether，引导宾语从句，时态需根据语境确定。
如：I don't know if he will come tomorrow. If he comes，I will tell you.我不知道他明天是否会来。如果他来，我就会告诉你。(前一个if表示“是否”，引导宾语从句； 后一个if表示“如果”，引导条件状语从句)
2.If条件句的同义句：
（1）借助“祈使句+and/or +句子（一般将来时结构）”这一句型来转换。其中，在句意上and表示顺承；or表示转折，意为“否则”。即祈使句，and /or+将来时态的陈述句。
Work hard ,and you will make great progress.（and 并且）
=If you work hard,you will make great progress.
如果你努力学习，你才会取得大的进步。
Hurry up, or you will be late.（or 否则）
=If you don't hurry up. you will be late.
如果你不快点，你就要迟到了。
（2）借助without或with来转换条件状语从句。
If there is no water, fish will die.=Fish will die without water.
3a
Fill in the blanks with the correct forms of the verbs in brackets.
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) a taxi, it ______ (be) too expensive. Can you give me some advice please
Tina
know
do
think
go
will be
tells
have
wear
will look
go
walk
will take
take
will be
upset不安的
advice 建议（不可数名词）
advice意为“劝告；建议”是不可数名词，不能说a advice, 而是
a piece of advice，也因为advice是不可数名词。“两个
（则）建议”，我们通常说two pieces of advice.
注意：piece要采用复数，advice不可数，但piece可数。
我们也可以说为some pieces of advice一些建议。
如：Can you give me some advice 你能给我一些建议吗？
与advice有关的一些词组：ask advice of 向...征求意见, 请教
by sb.'s advice 依某人劝告 on sb.'s advice 依某人劝告
follow sb.'s advice 接受某人意见 give advice 劝告, 忠告
Can you give me some advice please
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 _______________________.
I will miss the school bus
my teacher will be angry
I won’t be strong
I play computer games all the day
I always make them upset
3b
Complete the sentences using your own ideas.
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.
3c
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 ...
Chain story:
Fun time now!
Chain story:
If I get up at 9:00 tomorrow, I’ll be late. If I am late, the teacher will be very angry. If the teacher is very angry, he will call my mother. If he calls my mother, she will cry. If she cries, I will be sad. If I am sad, I will eat a lot. If I eat a lot, I will be very fat. If I am very fat, I won’t be handsome. If…
谢谢
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