资源简介

(共32张PPT)
八上英语人教
Unit 8
Let’s
Communicate ！
Let’s
Communicate ！
Section A How do we communicate
第三课时 3a-3c
Part 1
Learning
goals
学习新词和短语: meeting, difficulty, right away, line, drop sb a line, detail, reunion, seriously, training
学习if引导的条件状语从句
1.学习目标
Part 2
Warming up
If引导的条件
状语从句
Part 3
Grammar
Read the sentences. Find more sentences with if-clauses in Section A.
3a
if
条件句
Texting can make things worse if you’re not careful with your words.
If you want to solve the problem, a face-to-face talk usually works the best.
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.
3a
Texting can make things worse if you’re not careful with your words.
If you want to solve the problem, a face-to-face talk usually works the best.
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.
Read the sentences. Find more sentences with if-clauses in Section A.
一般现在时
一般现在时
带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
if
条件句
if 引导的条件状语从句由 “if + 从句，主句” 构成。
1. 基本结构
例如：If you want to solve the problem, a face-to-face talk usually works the best.（如果你想解决问题，面对面交谈通常是最好的方式。）
其中，“If you want to solve the problem” 是条件状语从句，“a face-to-face talk usually works the best” 是主句 。
在 if 引导的条件状语从句中，当主句描述将来的情况时，主句用一般将来时（will + 动词原形），从句用一般现在时表示将来。
2.时态搭配（主将从现原则）
例如：If it doesn’t rain tomorrow, we will go for a picnic.
（如果明天不下雨，我们就去野餐。）
“If it doesn’t rain tomorrow” 是从句，用一般现在时；
“we will go for a picnic” 是主句，用一般将来时 。
当主句是祈使句或含有情态动词(如 can、may、 must 等)时，从句仍然用一般现在时。
3.特殊情况
例如：If you need help, call me.
（如果你需要帮助，打电话给我。）
主句是祈使句，从句用一般现在时；If you can finish your work early today, you can go home.（如果你今天能早点完成工作，你就可以回家。）主句含有情态动词 can，从句用一般现在时 。
注意事项
1.if 从句位置
if引导的条件状语从句可以放在主句前，也可以放在主句后。当 if 从句在主句前时，从句后要用逗号与主句隔开；当 if 从句在主句后时，不用逗号隔开。
例如：If you stay calm and say sorry, it will help.
　 = It will help if you stay calm and say sorry.
（如果你保持冷静并道歉，这会有帮助。）
注意事项
2.与其他引导词引导的状语从句区别
if 引导的条件状语从句与 when 引导的时间状语从句在用法上有相似之处，但 when 强调时间点或时间段，而if 强调条件。
例如：When I grow up, I will be a teacher.
（当我长大后，我会成为一名教师。）强调时间；
If I study hard, I will pass the exam.
（如果我努力学习，我会通过考试。）强调条件 。
注意: 宾语从句中的if与条件状语从句if的区别。
宾语从句中的if “是否”相当于whether, 引导宾语从句, 时态需根据语境确定。
I don’t know if it will rain tomorrow.
我不知道明天是否会下雨。
a. You think you’ re going to visit New York City.
b. You will see some tall buildings.
仿照例子把两句话合成一句话。
Example:
→ If you go to visit New York City,
you’ll see some tall buildings.
a. You think you’re going to study English hard.
b. You will do better in English.
→ If you study English hard, you’ll do better in
English.
01
a. You think you’re going to eat and drink more.
b. You will be fatter.
→ If you eat and drink more, you’ll be fatter.
02
a. They think they are going to do more exercise.
b. They will be healthier.
→ They will be healthier if they do more exercise.
03
a. I think you are going to let me watch TV.
b. I will stay at home.
→ I will stay at home if you let me watch TV.
04
Part 4
Exercises
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,
Match the two parts to make sentences.
3b
try texting.
we’ll understand each other better.
you can write things down for him.
I’ll call you right away.
I’ll call a taxi for you.
will you join me for dinner
... 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 .
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.
3c
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
Exercises
Ⅰ. 翻译下列句子。
1.如果你不赶快走, 你就会迟到。
2.如果你爱你的父母, 你应当帮他们做做家务。
3. 如果你更友善一些, 你会交上很多好朋友。
If you don’t go soon, you’ll be late.
You should help do the housework if you love your parents.
You will make lots of friends if you are more friendly.
4. 如果你带外校的朋友来, 老师会让他们离开。
5. 如果你不完成作业, 妈妈不会让你玩电脑游戏。
6. 当你看到Bill Gates, 你会对他说些什么？
If you bring friends from other schools, the teacher will ask them to leave.
If you don’t finish your homework, your mother won’t let you play computer games.
What will you say to Bill Gates when you see him
Part 5
Language
points
(1)difficulty n. 困难；难题（教材P75）
difficulty n. 困难；难题，当表示具体意义的难处、难事时，是可数名词，其复数形式是difficulties；当表示抽象意义的困难时，是不可数名词，常用于短语have （no）difficulty （in）doing sth.“做某事（没）有困难”。
difficulty 的形容词形式是difficult，意为“困难的”。
I have difficulty in solving that problem by myself.
我独自解决那个问题有困难。
(2)line n. 字行；便条；线（教材P75）
line n. 意为“字行；便条；线”。draw a line画一条线，drop sb. a line给某人写信。
line 作名词还可意为“行列；队伍”。
常用搭配
stand/wait in line 站队/ 排队等候
cut in line 插队
line 还可意为“电话线路”。
常用搭配
hold the line 别挂断电话
on the line 通话中
(3)seriously adv. 严肃地；认真地（教材P75）
seriously 是副词，意为“严肃地；认真地”，在句中修饰动词作状语。
常用短语
take sth. seriously 认真对待某事
她认真对待自己的学业，总是获得好成绩。
She __________ her studies ________ and always gets good grades.
takes seriously
Part 6
Summary
6.Summary
结构：If + 一般现在时，主句 + will + 动词原形（或情态动词 /can/may/should 等）。
特点：表示主句动作发生所需条件的从句
时态：从句用一般现在时表将来，主句用 “will + 动词原形” 表将来的动作，遵循“主将从现”原则。
01
02
03
Part 7
Homework
Write five sentences with if structure.
7.Homework
Thank You!

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