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(共39张PPT)
Unit 8
UNIT
8
Let’s Communicate!
zero conditional; first conditional
能够归纳并总结出真实条件句的句式结构特点、表意功能及其用法。
能够根据假设情境匹配出完整的条件句。
能够根据文本形态及内容推断出与之相关的交流方式与交际情境，并在语境中正确运用条件句描述未来可能发生的事情。
Listen to the song and complete the blanks.
____ you ever find yourself stuck in the middle of the sea
____ sail the world to find you
If you ever _____ yourself lost in the dark and you can't see
____ be the light to guide you
If
I'll
find
I'll
if引导的条件状语从句
If后面的是从句，一般现在时
另一部分是主句，一般将来时
Sing the song together.
Read the sentence.
If you want to solve the problem, a face-to-face talk usually works the best.
Texting can make things worse if you’re not careful with your words.
If the rehearsal ends at 7:00 p.m., I’ll pick you up at 7:15 p.m.
If you stay calm and say sorry, it will help.
If I go there, I will try all the delicious local food.
What’s the similarity (相似性) of these sentences
if引导的条件状语从句
if 引导的是从句
If you want to solve the problem, a face-to-face talk usually works the best.
Texting can make things worse if you’re not careful with your words.
If the rehearsal ends at 7:00 p.m., I’ll pick you up at 7:15 p.m.
If you stay calm and say sorry, it will help.
If I go there, I will try all the delicious local food.
What are the tenses of the main clause (主句) and the subordinate clause (从句)
一般现在时
一般现在时
一般现在时
含情态动词的一般现在时
一般现在时
一般将来时
一般现在时
一般将来时
一般现在时
一般将来时
If you want to solve the problem, a face-to-face talk usually works the best.
Texting can make things worse if you’re not careful with your words.
If the rehearsal ends at 7:00 p.m., I’ll pick you up at 7:15 p.m.
If you stay calm and say sorry, it will help.
If I go there, I will try all the delicious local food.
zero conditional sentence
零条件句
first conditional sentence
第一条件句
Find more sentences with if-clauses in Section A.
"If you can't meet, just call your friend."
"If it is still hard to talk, take a break."
"If you can come, I'll be very happy."
"If you want to make some new friends, this is a good chance."
"If you talk to ..., I think he / she will be happy to help you."
条件状语从句的时态和主句的时态有何关系？
什么是条件状语从句？
条件状语从句和主句的位置关系是怎样的？
条件状语从句可以和其他句式进行转换吗？
if引导的条件状语从句
在复合句中作条件状语的句子叫条件状语从句。
条件状语从句常用if 来引导。
If引导的条件状语从句包含零条件句和第一条件句。
零条件句：
一般表示普遍存在的事实、真理或习惯行为。
条件成立时，结果必然出现，不存在任何不确定性。
第一条件句：
用于表示在特定条件下可能会发生的情况。
结果的实现是有条件的，且这个条件有实现的可能性。
含义
e.g. If you want to keep fit, you should exercise at least thirty minutes a day.
如果你想保持健康，你每天至少应该锻炼三十分钟。
The children won’t pay attention to their mistakes if the teachers don’t tell them.
如果老师不告诉孩子们，他们就不会注意到自己的错误。
if 引导的条件状语从句，既可放在主句前，也可放在主句后。
位于主句前，要用逗号与主句隔开；
位于主句后，其前不必用逗号。
用逗号与主句隔开
位置
Zero conditionals 零条件句
描述客观事实、自然规律、普遍真理或习惯性行为。
条件成立时，结果必然发生。
If + 一般现在时，主句 + 一般现在时。
e.g. If you heat water to 100°C, it boils.
如果你把水加热到100°C，它就会沸腾。
If the sun sets, it gets dark.
如果太阳落山，天就会变黑。
结构：
时态
客观事实
自然规律
e.g. If it rains tomorrow, we will stay at home.
如果明天下雨，我们就待在家里。
First conditionals 第一条件句
表示在特定条件下可能会发生的情况、结果或行为。
表达将来可能发生的条件和结果，结果发生的可能性较高。
If + 一般现在时，主句 + 一般将来时。
结构：
主将从现
从句
主句
一般将来时
一般现在时
从句用一般现在时表示将来意义
e.g. If we start right away, we can finish the work on time.
如果我们马上开始，就能按时完成这项工作。
If + 一般现在时，主句 +情态动词may, might, can, must, should等的句子。
主情从现
从句
主句
含情态动词的一般现在时
一般现在时
e.g. Work hard if you want to pass the exam.
如果你想通过考试，就得努力学习。
If + 一般现在时，主句 +祈使句。
主祈从现
主句
从句
一般现在时
祈使句
句型转换
1. 借助“祈使句+and/or+句子（一般将来时）”句型来转换。
and 在句意上表示顺承，意为“那么，就”；
or 表示转折，意为“否则”。
e.g. If you get up early, you’ll catch the school bus.
= Get up early, and you’ll catch the school bus.
= Get up early, or you won’t catch the school bus.
早点起床，你就会赶上校车。
2. 借助 without 或 with 来转换条件状语从句。
e.g. If there is no sunshine, plants will die.
=Plants will die without sunshine.
如果没有阳光，植物将会死亡。
If you help me, I’ll get better grades.
=With your help, I’ll get better grades.
如果你帮助我，我将取得更好的成绩。
1) Put up your hands if you ___________ (have) any questions.
2) If it ___________ (be) cold tomorrow, I will wear my sweater.
3) He can go home if he ___________ (finish) his homework.
4) 如果他来了，我们会让你知道的。
If he ___________, we ___________ you know.
5) 如果她有空，她会开车来我家的。
If she ___________, she _________ to my home.
finishes
have
is
【语境应用】完成句子。
comes will let
is free will drive
句型转换。
1. They will invite me. I’ll go to the party. (用if合并为含有条件状语从句的复合句，且从句在前)
2. I’ll come back late this evening. Don’t wait for me to have dinner. (用if合并为含有条件状语从句的复合句，且从句在后)
If they invite me, I will go to the party.
Don’t wait for me to have dinner if I come back late this evening.
Match the two parts to make sentences.
1. If we have a face-to-face meeting,
2. If I have good news,
3. If you need to leave,
4. If you can finish your work early today,
5. If the old man has difficulties in hearing,
6. If you can’t reach her by phone,
A. try texting.
B. we’ll understand each other better.
C. you can write things down for him.
D. I’ll call you right away.
E. I’ll call a taxi for you.
F. will you join me for dinner
Scan the passages and answer the questions.
What kind of texts are they
What forms of communication are they connected with
note
voice messages
Fill in the blanks with the correct forms of the verbs in brackets. Then discuss what the situations are and whom the information is for.
... If things ________ (go) well, we ________(see) all those old faces again. Just think how great it will be! If you think you can come, ________(drop) me a line and I ________(give) you all the details about the reunion. But promise me you’ll think about it seriously.
go
will wee
drop
will give
situation
whom
Someone the speaker wants to invite to a reunion.
It's about a reunion. The speaker is inviting someone.
Hey, it’s me. I wanted to talk to you about the training plan for our team. The new season is coming, so it’s time to make a plan for our training. If we ________ (start) earlier this year, I think we ____________ (perform) better. ________ (give) me a call and ________ (let) me know if you ________ (think) of a good time for everyone to meet. Talk to you soon!
start
will perform
Give
let
think
situation
whom
A member of the team (someone involved in the team's training plan).
It's about making a training plan for a team as the new season is coming.
If your friend doesn't answer your phone call, how will you communicate with him/her
If my friend doesn't answer your phone call, I will send a message to her.
If my friend doesn't answer your phone call, I will call her later.
If my friend doesn't answer your phone call, I will ask her family members to tell he to call me back.
If there is no time to text, how will you communicate
If you want to thank your classmate but she is absent, how will you communicate with her
difficulty n. 困难；难题
have difficulty (in) doing sth. 做某事有困难 (介词in可以省略)
1. If the old man has difficulties in hearing, you can write things down for him.
如果这位老人听力有困难，你可以把事情写下来给他看。
当表示做一件事的困难程度时，常作不可数名词，其前可用some，no等词修饰
当表示具体的困难、难处、难点时，作可数名词。
e.g. I have great difficulty with English grammar.
我在英语语法方面有很大困难。
Jack has a good memory. He has no difficulty (in) remembering these words.
Jack记忆力很好，他记这些单词毫不费力。
David can always face all kinds of difficulties.
David总是能够勇敢地面对各种困难。
have difficulty with sth 在某事上有困难
【语境应用】根据汉语意思完成英语句子，每空一词。
如果你有任何困难，去找你的老师帮忙。
Go to your teacher for help if you are in ________ ________.
2) 我们不得不面对各种各样的困难。
We have to face all kinds of __________.
3) 詹妮学习汉语不费劲。
Jenny had no _________ _________ Chinese.
any difficulty
difficulties
difficulty learning
2. The new season is coming, so it’s time to make a plan for our training.
新赛季就要来了，所以是时候制订我们的训练计划了。
It’s time to do sth. 到做某事的时候了
与It’s time for sth.表达的意思相同
e.g. It’s time to have breakfast. = It’s time for breakfast.
该吃早饭了。 = 到吃早饭的时间了。
It’s time to go to school. = It’s time for school.
该去上学了。 = 到上学的时间了。
It’s time for sb. to do sth. 是某人做某事的时候了
e.g. It’s time for Dad to cook dinner.
条件句 含义 if 从句 主句(谓语动词)
零条件句 描述客观事实、自然规律、普遍真理或习惯性行为。条件成立时，结果必然出现。 if +一般现在时 一般现在时
第一条件句 表示在特定条件下可能会发生的情况、结果或行为。结果的实现是有条件的，且这个条件有实现的可能性。 if +一般现在时 will + 动词原形
/ 含情态动词的句子
/ 祈使句
Ⅰ. 根据句意及括号内所给词的提示填空。
1. I __________(not go) fishing if it __________(not be) fine tomorrow.
2. Please tell me if you __________(need) help.
3. If it __________(rain) tomorrow, we __________(take) a taxi to the museum.
4. If he ___________(not call) me, I ___________(not leave) here.
5. What will you do if you __________(feel) upset
won’t go
isn’t
need
rains
will take
doesn’t call
won’t leave
feel
Ⅱ. 根据短文内容及括号内所给英文提示语补全短文（答案不唯一）。
These days Wang Meng is planning to spend her July vacation somewhere. She uses the Internet to find out information about places she might like to visit. So far, she has got a lot of information. (1) _________________________________________
________(if, spend, near the water, Sanya). There she can enjoy beautiful beaches. However, (2) __________________________
_______________________________ (if, Sanya, have to, stand, the high temperature). Wang Meng also likes to go camping, so vacationing in the mountains is another choice (选择).
If she spends her time near the water, she can go to Sanya
if she goes to Sanya, she will have to stand the high temperature
(3) __________________________________________________
______________ (choose, Changbai Mountain, if, want, cooler weather). Wang Meng is a foodie (吃货), so she also wants to go to Chengdu. (4) ______________________________________ (if, Chengdu, visit pandas). Wang Meng can't decide where to go because she wants to visit all of the places. But she knows that
(5) ___________________________________________________
________ (not, be able to, unless, enough money and time). She hopes to make it happen one day!
She will choose to visit Changbai Mountain if she wants cooler weather
If she goes to Chengdu, she will visit pandas
she won't be able to do so unless she has enough money and time
I can
归纳并总结出真实条件句的句式结构特点、表意功能及其用法。
能够根据假设情境匹配出完整的条件句。
能够根据文本形态及内容推断出与之相关的交流方式与交际情境，并在语境中正确运用条件句描述未来可能发生的事情。
Review
Grammar Focus.
Preview Section B.
Read the new words.
Write at least 5 sentences using first conditionals.

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