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(共31张PPT)
R·八年级上册
UNIT 8 Let’s communicate!
第3课时
（Section A Grammar Focus 3a-3c）
Enjoy a song
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 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.
3a
Read the sentences. Find more sentences with if -clauses in Section A.
What’s the similarity (相似性) of these sentences
if引导的条件状语从句
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 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.
一般现在时
一般现在时
含有情态动词的一般现在时
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
What are the tenses of the main clause (主句) and the subordinate clause (从句)
位置 例句
Section A 1b, 1c 1. We’ll finish at 7:00 p.m. if it’s on time.
2. If everything goes well, I’ll see you at 7:15.
3. If the traffic is too bad, you’ll have to wait for a few minutes.
4. If I visit China this year, I will go to the park with you.
5. If you can make it, I’ll show you around the city and let you taste all the yummy local food.
6. When will the rehearsal end if it’s on time
7. What will the man do if he visits China this year
Read Section A and find more examples.
位置 例句
Section A 1d 1. If you come to my city, I’ll show you around.
2. If I go there, I’ll try all the delicious local food.
Section A 2a and 2d 1. If you want to solve the problem, a face-to-face talk usually works the best.
2. If you can’t meet, just call your friend.
3. Some of you may prefer texting, but it takes longer and can make things worse if you’re not careful with your words.
位置 例句
Section A 2a and 2d 4. If you stay calm and say sorry, it will help.
5. If it is still hard to talk, take a break.
Section A 2e 1. If you can come, I’ll be very happy.
2. If you want to make some new friends, this is a good chance.
3. If you need help, I think you should tell …
4. If you talk to …, I think he / she will be happy to help you.
5. If you go there, you’ll …
6. If you join me, we can …
条件状语从句的时态和主句的时态有何关系？
Discuss and say
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。
概 述
Let’s learn
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。
◆ 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。
用逗号与主句隔开
位 置
◆ 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。
在含有if 引导的条件状语从句的主从复合句中，当主句为下列情形之一时，条件状语从句要用一般现在时表达将来的含义。
（1）主句是一般将来时。
◆ If it’s sunny tomorrow, they will go camping.
如果明天是晴天，他们就去露营。
一般现在时
一般将来时
从句
主句
（主将从现）
时 态
高频考点
（2）主句是含有情态动词may, might, can, must, should
等的句子。
◆ If we start right away, we can finish the work on time.
一般现在时
情态动词
从句
主句
如果我们马上开始，就能按时完成这项工作。
（3）主句是祈使句。
◆ Work hard if you want to pass the exam.
祈使句
一般现在时
从句
主句
如果你想通过考试，就得努力学习。
（1）借助“祈使句+and/or+句子（一般将来时）”这一句型来转换。and 在句意上表示顺承，意为“那么，就”；or 表示转折，意为“否则”。
句型转换
高频考点
◆ 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。
◆ 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。
Let’s practise
一、用括号内所给内容的适当形式填空。
1. Don’t play football outside if it ______ (rain) this
afternoon.
2. If you don’t listen carefully, you ____________ (not
know) the answer.
rains
won’t know
3. Amy is so confident. She thinks she can do anything
if she _____ (try) her best.
4. _____ (tell) Jim the good news if you ______ (meet)
him tomorrow morning.
5. My aunt _________ (take) my cousin and me to the
concert if she _____ (get) the tickets.
Tell
meet
will take
gets
tries
二、单项选择。
1. （河北中考）_____ you can use your dictionary,
you will learn English better.
A. If B. Unless C. Though D. Before
2. （郴州中考） — I really want to go to college for
further study. — Believe in yourself. If you ______
hard, your dream will come true.
A. will study B. studied C. study
A
C
3. （贺州中考） I don’t know if Lucy _____ to Jack’s
party next Sunday. If she _____, so will I.
A. go; goes B. will go; will go
C. goes; will go D. will go; goes
D
三、按要求完成句子，每空一词。
1. Study hard, and you will pass the exam.
（改为同义句）
_____ you study hard, you ____ pass the exam.
2. Without enough exercise, you will get fat.
（改为同义句）
_____ _______ ________ take enough exercise, you
will get fat.
If
will
If you don’t
3b
Match the two parts to make sentences.
1. If we can 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
join sb for sth 与某人一起做某事；参与或加入某人的行列中一起做某事
have difficulties (in) doing sth 做某事有困难
right away 立即；马上
write down 写下；记下
reach
Language points
①（及物动词）联系，与……取得联系
◇ If you need help, you can reach me anytime.
如果你需要帮助，你可以随时联系我。
②（及物动词）到达
◇ We all reached the top of the mountain except Tim.
除了蒂姆，我们都到达了山顶。
③（动词）伸手
◇ She reached inside her bag for a wallet.
她把手伸到包里拿钱包。
= arrived at/got to
3c
Fill in the blanks with the correct forms of the verbs in brackets.
... 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 see
drop
will give
how引导的感叹句作think的宾语
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
make a plan 制订计划
a good time (for sb) to do sth（某人）做某事的好时候
Language points
It’s time (for sb) to do sth.
到（某人）做某事的时间了。
◇ It’s time for you to get up. 你该起床了。
拓展：It’s time for (doing) sth.
到（做）某事的时间了。
◇ It’s time for training. 到训练的时间了。
3c
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 see
drop
will give
围绕聚会相关的假设交流
邀请参加聚会的对象
situation
whom
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
团队训练计划的沟通
团队里一起参与训练计划讨论的成员
situation
whom
Homework
1. Review the new words and phrases.
2. Review the grammar knowledge of if -clauses.
3. Make up sentences by using if -clauses.

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