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Unit 3 Sound Body, Sound Mind
Grammar in use
（仁愛版 2024）八年級
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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5
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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!
變否定
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 吸煙者
不吸煙者
agree同意
不同意
healthy健康的
不健康的
correct正確的
不正確的
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
02
Activity 1 Read and think.
定義：在一個詞的詞根前面或后面加上某個詞綴來產生新詞，這種構詞法稱為__________________。加在前面的詞綴叫_________，加在后面的詞綴叫______________。
本節課主要探討英語中常見的否定前綴的用法：
英語中前綴 non-, dis-, un-, mis-, in-, im- 都具有_________含義，通常加在形容詞、名詞或動詞前，改變單詞原本的意思。
派生法或詞綴法
前綴
后綴
否定
Presentation
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Activity 1 Read and think.
前綴 含義 搭配對象 語境特點 例詞
mis- 錯誤、不當（動作失誤） 動詞、少數名詞 強調 “失誤” 而非 “否定” ①understand 理解→misunderstand 誤解
②lead 引導→mislead 誤導
in- 否定（正式形容詞否定） 輔音開頭的形容詞（長詞） 正式書面語，拉丁語詞根 ①correct 正確的→incorrect 不正確的
②complete 完整的→incomplete 不完整的
im- 否定（in- 的變體） 以 b/m/p 開頭的形容詞 因發音調整拼寫 ①possible 可能的→impossible 不可能的
②polite 禮貌的→impolite 不禮貌的
Presentation
02
Activity 1 Read and think.
前綴 含義 搭配對象 語境特點 例詞
non- 非、無（類別否定） 名詞、形容詞 正式，學術 / 科技領域 ①smoker 吸煙者→non-smoker 不吸煙者
②stop 停止→non-stop 直達的，不停的
dis- 相反、否定（動作逆轉） 動詞、形容詞、名詞 通用，強調 “反向動作” ①agree 同意→disagree 不同意
②appear 出現→disappear 消失
un- 否定、相反（通用否定） 形容詞、動詞、副詞 最常用，口語 / 書面語 ①happy 開心的→unhappy 不開心的
②able 能的→unable 不能的
Presentation
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Activity 1 Read and think.
non- 側重 “類別否定”，如 “非虛構”“不吸煙”；
dis- 側重 “動作逆轉”，如 “不同意”“消失”；
un- 是最通用的否定前綴，可接形容詞、動詞；
mis- 核心是 “動作失誤”，如 “誤解”“誤導”；
in- 和 im- 是正式的形容詞否定前綴，im- 僅用于b、m、p開頭的詞根。
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” “對…… 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 對……有害
sleepy adj. 困倦的
What’s worse 更糟糕的是
clearly adv.明顯地
get rid of 擺脫
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” 是實義動詞。當 “need” 作為實義動詞時，有人稱和數的變化，后面接動詞不定式 “to do”。
例： “I need to get some sleep now.”（我現在需要睡一會兒）
“You need to take care of yourself.”（你需要照顧好自己）
“need” 根據主語的不同，形式也有所不同（I need，You need），并且后面都接了動詞不定式來表示具體需要做的事情。
Activity 1 Read and learn.
Presentation
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needn't do： “不必做某事”
這里的 “need” 是情態動詞。情態動詞 “need” 沒有人稱和數的變化，后面接動詞原形。
例：“You needn't stay up.”（你不必熬夜）
“needn't” 直接接動詞原形 “stay up”，用來表示建議或推斷。
Activity 1 Read and learn.
Presentation
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don't need to do： “不需要做某事”
同樣 “need” 是實義動詞。其否定形式是在 “need” 前面加助動詞 “don't” 或 “doesn't‘’，后面接動詞不定式 “to do”。
Activity 1 Read and learn.
Presentation
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need為實義動詞，表示需要，其后加不定式。有人稱變化
肯定結構：need to do sth. 需要做某事
否定結構：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(診斷). (Pay attention to prefixes and need)
Production
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Hospital Simulation: Grammar Diagnosis Expert
Words bank
否定前綴相關：non-smoker, disagree, unhealthy, incorrect, impossible, uncomfortable, dislike, misplace, nonstop, impatient, improper
“need” 相關：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...
醫生診斷：Your... habit makes you feel... It's... for your health.
醫生建議：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 (內容清晰)
Pronunciation(發音標準)
Body language(使用肢體語言)
Fluently(流利的) Reasonable(理由合理)
Sentence Structure:
Grade and share:
Interview each other about digital life experiences.互相采訪關于數字生活的體驗
Show time
Talk clearly (內容清晰)
Pronunciation(發音標準)
Body language(使用肢體語言)
Fluently(流利的)
Reasonable(理由合理)
Grade and share:
Unit 3 Sound Body, Sound Mind
The grammar we have learned
一、根據提示填空。
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、根據提示填空。
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.
基礎：完成教材中關于否定前綴和 “need” 用法的基礎練習題，Activity 2 和 Activity 3。
Homework
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提升：用所學的否定前綴和 “need” 的三種結構，寫一篇短文，介紹自己的生活習慣和需求。
拓展：小組合作收集更多帶有否定前綴的單詞，并制作一份單詞表。
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