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(共30张PPT)
Unit 3 Sound Body, Sound Mind
Grammar in use
（仁爱版 2024）八年级
上
Learning objectives
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Lead in
Presentation
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Practice
Production
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Summary
Assessment
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Homework
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By the end of the lesson, I will be able to...
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understand negative prefixes, master "need" structures;
use words with negative prefixes and "need"-related structures;
use such words and structures to creatively share views or suggestions on healthy habits.
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Learning objectives
https://www.21cnjy.com二一教育
What can you find in this video
Lead in
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Watch and sing.
Lead in
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Look and think.
It's unbearable!
It's unbelievable!
You're so ungrateful!
变否定
bearable
believable
grateful
Look at more examples!
Look at the pictures and read the sentences. Pay attention to the words in bold.
Presentation
02
Activity 1 Look and read.
Grammar in Use
He became a non-smoker in order to keep healthy.
Sea food may seem to disagree with some people.
Hamburgers may taste delicious, but it is unhealthy to eat too many of them.
It is incorrect to do sports with an empty stomach.
seem /si:m/ v. 好像,似乎
unhealthy / n helθi/ adj. 不健康的
Look at the pictures and read the sentences. Pay attention to the words in bold.
Presentation
02
Activity 1 Look and read.
Grammar in Use
Prefixes non-, dis-, un-, mis-, in- and im-
He became a non-smoker in order to keep healthy.
Sea food may seem to disagree with some people.
Hamburgers may taste delicious, but it is unhealthy to eat too many of them.
It is incorrect to do sports with an empty stomach.
Look at the pictures and read the sentences. Pay attention to the words in bold.
Presentation
02
Activity 1 Look and read.
Grammar in Use
Prefixes non-, dis-, un-, mis-, in- and im-
He became a non-smoker in order to keep healthy.
Sea food may seem to disagree with some people.
Hamburgers may taste delicious, but it is unhealthy to eat too many of them.
It is incorrect to do sports with an empty stomach.
smoker 吸烟者
不吸烟者
agree同意
不同意
healthy健康的
不健康的
correct正确的
不正确的
nonsmoker disagree unhealthy incorrect
What word can you find in these words
smoke
smoker
non
agree
dis
healthy
un
correct
in
We put “non-, dis-, un-, in-” in front of the words, these are called “prefix”.
Presentation
02
Activity 1 Read and think.
Presentation
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Activity 1 Read and think.
定义：在一个词的词根前面或后面加上某个词缀来产生新词，这种构词法称为__________________。加在前面的词缀叫_________，加在后面的词缀叫______________。
本节课主要探讨英语中常见的否定前缀的用法：
英语中前缀 non-, dis-, un-, mis-, in-, im- 都具有_________含义，通常加在形容词、名词或动词前，改变单词原本的意思。
派生法或词缀法
前缀
后缀
否定
Presentation
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Activity 1 Read and think.
前缀 含义 搭配对象 语境特点 例词
mis- 错误、不当（动作失误） 动词、少数名词 强调 “失误” 而非 “否定” ①understand 理解→misunderstand 误解
②lead 引导→mislead 误导
in- 否定（正式形容词否定） 辅音开头的形容词（长词） 正式书面语，拉丁语词根 ①correct 正确的→incorrect 不正确的
②complete 完整的→incomplete 不完整的
im- 否定（in- 的变体） 以 b/m/p 开头的形容词 因发音调整拼写 ①possible 可能的→impossible 不可能的
②polite 礼貌的→impolite 不礼貌的
Presentation
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Activity 1 Read and think.
前缀 含义 搭配对象 语境特点 例词
non- 非、无（类别否定） 名词、形容词 正式，学术 / 科技领域 ①smoker 吸烟者→non-smoker 不吸烟者
②stop 停止→non-stop 直达的，不停的
dis- 相反、否定（动作逆转） 动词、形容词、名词 通用，强调 “反向动作” ①agree 同意→disagree 不同意
②appear 出现→disappear 消失
un- 否定、相反（通用否定） 形容词、动词、副词 最常用，口语 / 书面语 ①happy 开心的→unhappy 不开心的
②able 能的→unable 不能的
Presentation
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Activity 1 Read and think.
non- 侧重 “类别否定”，如 “非虚构”“不吸烟”；
dis- 侧重 “动作逆转”，如 “不同意”“消失”；
un- 是最通用的否定前缀，可接形容词、动词；
mis- 核心是 “动作失误”，如 “误解”“误导”；
in- 和 im- 是正式的形容词否定前缀，im- 仅用于b、m、p开头的词根。
Fill in the blanks with the correct form of the given words.
dislike uncomfortable impossible nonstop misplace
1. It is ______________ to keep healthy without good living habits.
2. Don't eat too much junk food, or you will feel ________________.
3. She __________ ice cream because it's bad for her teeth.
4. My sister's room is tidy, and she never ____________ her things.
5. We felt very tired after a long and __________ walk.
impossible
uncomfortable
dislikes
misplaces
nonstop
Presentation
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Activity 2 Fill in the blanks.
“keep healthy” “保持健康”
“eat too much junk food” “吃太多垃圾食品”
“be bad for” “对…… 有害”
Read the text and fill in the blanks with the words in the box.
impatient nonsense uncomfortable improper
A(n) ____________ habit does a lot of harm to people. For example, staying up late is very bad for people’s health. Clearly, they will feel sleepy and _______________ next day. What’s worse, people will become _____________ and they may even forget important dates. Sometimes, they will speak ___________ because their minds are not clear. To get rid of the habit, people need to sleep early and do some sports. A healthy body and a clear mind will make them feel good all day.
improper
uncomfortable
impatient
nonsense
be bad for 对……有害
sleepy adj. 困倦的
What’s worse 更糟糕的是
clearly adv.明显地
get rid of 摆脱
Activity 3 Read and fill.
Presentation
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Activity 1 Pair work.
What's the matter with you
You can watch the games online next day. You needn't stay up. You need to take care of yourself.
I stayed up to watch the soccer game last night. I need to get some sleep now.
OK. Thank you for your advice.
Read the conversation. Pay attention to need.
Presentation
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need to do： “需要做某事”
其中 “need” 是实义动词。当 “need” 作为实义动词时，有人称和数的变化，后面接动词不定式 “to do”。
例： “I need to get some sleep now.”（我现在需要睡一会儿）
“You need to take care of yourself.”（你需要照顾好自己）
“need” 根据主语的不同，形式也有所不同（I need，You need），并且后面都接了动词不定式来表示具体需要做的事情。
Activity 1 Read and learn.
Presentation
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needn't do： “不必做某事”
这里的 “need” 是情态动词。情态动词 “need” 没有人称和数的变化，后面接动词原形。
例：“You needn't stay up.”（你不必熬夜）
“needn't” 直接接动词原形 “stay up”，用来表示建议或推断。
Activity 1 Read and learn.
Presentation
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don't need to do： “不需要做某事”
同样 “need” 是实义动词。其否定形式是在 “need” 前面加助动词 “don't” 或 “doesn't‘’，后面接动词不定式 “to do”。
Activity 1 Read and learn.
Presentation
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need为实义动词，表示需要，其后加不定式。有人称变化
肯定结构：need to do sth. 需要做某事
否定结构：don’t need to do sth.不需要做某事
Complete the table and learn how to use need.
Need Example
need to do We need ________ (get) enough sleep every day.
don’t/doesn’t need to do The girls is getting well and she doesn’t need ____________
(take) the medicine now.
needn’t do Kangkang needn’t ______(do) the work today. He can hand it in tomorrow.
to get
to take
do
Practice
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Activity 2 Complete the table .
Read the sentences and circle the correct words.
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He (need/ needs) to take a break now. He looks so tired.
We (need/ needn't) to play sports every day to keep healthy.
You (needn't/ don't need) store so much food in the fridge.
You (needn't/ don't need) to worry about your grades. Just relax.
Both Maria and Meimei (need/ needn't) to lose weight.
Practice
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Activity 3 Read and circle.
Someone will be the doctor and some will be the patient. Then finish the diagnosis(诊断). (Pay attention to prefixes and need)
Production
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Hospital Simulation: Grammar Diagnosis Expert
Words bank
否定前缀相关：non-smoker, disagree, unhealthy, incorrect, impossible, uncomfortable, dislike, misplace, nonstop, impatient, improper
“need” 相关：need to exercise, need to eat vegetables, don't need to worry, needn't stay up late
Sentence Structure
病人描述病情：I feel... I have a... problem. My... is...
医生诊断：Your... habit makes you feel... It's... for your health.
医生建议：You need to... You don't need to... You needn't...
Guardians of the Earth: Ecosystem Ambassador Campaign
A：Hey! Do you know how important oceans are to our planet
B：Not really. Could you tell me
A：Sure! Oceans....
B：Wow, I had no idea! What about …
A：… are the Earth’s….
B：That's amazing! And …
A：… are the Earth’s ….
B：So what can we do to protect these ecosystems
A：We should ______ to reduce pollution and ______. Let's also ______ to plant more trees.
B：Great ideas! Everyone should join in protecting our planet!
Words bank:
ecosystem, protect, pollution, ocean, wetland, forest, oxygen, purify, cover, produce, prevent, trap, vital, take in, store, role, balance
Talk clearly (内容清晰)
Pronunciation(发音标准)
Body language(使用肢体语言)
Fluently(流利的) Reasonable(理由合理)
Sentence Structure:
Grade and share:
Interview each other about digital life experiences.互相采访关于数字生活的体验
Show time
Talk clearly (内容清晰)
Pronunciation(发音标准)
Body language(使用肢体语言)
Fluently(流利的)
Reasonable(理由合理)
Grade and share:
Unit 3 Sound Body, Sound Mind
The grammar we have learned
一、根据提示填空。
The food is _________________ (healthy) because it has too much sugar.
It's ______________ (polite) to talk loudly in the library.
He felt _________________ (happy) after hearing the bad news.
The answer is _________________ (correct), so you need to try again.
She _____________________ (understood) the question and asked the teacher for help.
Summary
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unhealthy
impolite
unhappy
incorrect
misunderstood
The grammar we have learned
二、根据提示填空。
We ___________ (need / need to) exercise every day to keep healthy.
You ____________________ (don't need to / needn't to) buy a new book-mine is available.
He ________ (needn't / doesn't need) worry about the exam; he studied hard.
They ___________ (need / need to) drink enough water when doing sports.
Summary
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need to
don't need to
needn't
need to
Assessment
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Self-assessment
I can understand negative prefixes, master "need" structures.
I can use words with negative prefixes and "need"-related structures.
I can use such words and structures to creatively share views or suggestions on healthy habits.
基础：完成教材中关于否定前缀和 “need” 用法的基础练习题，Activity 2 和 Activity 3。
Homework
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提升：用所学的否定前缀和 “need” 的三种结构，写一篇短文，介绍自己的生活习惯和需求。
拓展：小组合作收集更多带有否定前缀的单词，并制作一份单词表。
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