资源简介

(共20张PPT)
Section A 3a—3c
Unit 8
Let's Communicate!
Learning Objectives
1.通过观察语法表格，总结归纳if引导的条件状语从句的结构。
2.通过练习灵活运用if引导的条件状语从句。
Do you know if
零条件句：用于表达客观规律、科学事实或必然结果。
结构：If+一般现在时（从句），（主句是）一般现在时（或祈使句）。
例：If you heat ice, it melts. 冰加热会融化
从句
主句
It will be sunny tomorrow.
Let’s have a trip
tomorrow.
If it ____ sunny tomorrow, let’s ______ a trip.
Let’s ______ a trip if it_____sunny tomorrow.
is
have
have
is
第一条件句：
结构：If + 一般现在时，主句 为一般将来时/情态动词（如can 、may、might、should等+动词原形）。
如果你努力学习，你就会取得好成绩。
例：If you study hard, you will get good grades.
从句
主句
It is going to rain tomorrow.
I will stay at home.
If it _____ tomorrow, I _____ _____ at home.
I _____ _____ at home if it _____ tomorrow.
rains
will
stay
will
stay
rains
She must be late.
If she _____ to school, she _____ ___late.
She _____ ___late If she _____ to school.
She is going to
walk to school.
walks
must
be
must
be
walks
如果明天下雨，我就不去远足。
If it ______(rain) tomorrow,I __________(not go) hiking.
=I _________(not go) hiking,if it ______(rain) tomorrow
如果你努力学习，你就能通过这次考试。
You can pass the exam, if you ________(study) hard.
rains
won’t go
won’t go
rains
study
拓 展
第一条件句通常可与以下句型相互转换：
祈使句+and/or+一般将来时的句子。
如果你动作快，就不会上课迟到。
If you are quick, you won’t be late for class.
=Be quick, and you won’t be late for class.
含有介词with或without的句子。
如果没有水，我们无法生存。
If there is no water, we can’t live.
=We can’t live without water.
3a. Look at the form and sum up the structure.
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.
1.找出每个句子的主句和从句 ？
2.主句？从句？
观察
1. If we can have a face-to-face meeting, A. try texting.
2. If I have good news, B. I think we’ll understand each other better.
3. If you need to leave, C. you can write things down for him.
4. If you can finish your work early today, D. I’ll call you right away.
5. If the old man has difficulties in hearing, E. I’ll call a taxi for you.
6. If you can’t reach him by phone, F. will you join me for dinner
3b. Match the two parts to make sentences.
B
D
E
F
C
A
3c. 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 see
drop
will give
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
3c. 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.
Language points
have difficulties in doing sth 做某事有困难
right away 立刻；马上
=at once
write down 写下
drop sb a line 给某人写信
make a plan 制定计划
Summary
零条件句：If + 一般现在时，主句 + 一般现在时（或祈使句）
第一条件句：If + 一般现在时，主句 + will + 动词原形（或情态动词 /can/may/should 等）。
if引导的条件状语从句
零条件句
第一条件句
短语：
Exercise
1. I’ll buy a computer if I _____ (have) enough money.
2. If he _____ (go) to the party, he _______ (have) a great time.
have
goes
will have
3. You ___________ (not get) nervous if you _____ (do ) enough exercise.
4. If she ________ (finish ) work early, she ______ (go) home.
do
won’t get
finishes
will go
If it is sunny this weekend, I _____________________.
If it is sunny this weekend, I _________________________.
won’t stay at home
won’t watch television
Thank you for listening!

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