资源简介

(共25张PPT)
Unit 3 Sound Body, Sound Mind
Exploring the Topic:
Grammar in Use
(Prefixes non-, dis-, un-, mis-, in- and im- & need to do/don’t need to do/needn’t do)
掌握 “non- 、dis-等前缀” 及 “need” 相关单词与结构；
能在健康生活等场景中，用含前缀词汇和 “need” 的句子交流；
3. 树立健康生活观念，明白良好习惯的重要性。
Last Class Recap: Positive Attitudes & Tips
Positive attitudes bring benefits (better study/work, more confidence).
exercise more (ball games)
communicate with others
get enough sleep
play sports
find self-good points
write down bad feelings
Last class, we learned positive attitudes matter and ways to stay positive. Let’s recall these key tips!
Last Class Review: Key Points
Theme: Positive attitudes help us live better.
Tips: Exercise, communicate, sleep well, play sports, love ourselves, write down bad feelings.
These tips are about what we can do. Today, we’ll learn how to talk about them in English.
Activity 1
Prefixes non-, dis-, un-, mis-, in- and im-
Look at the pictures and read the sentences. Pay attention to the words in bold.
He became a non-smoker in order to keep healthy.
Seafood 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.
Activity 1
Prefixes non-, dis-, un-, mis-, in- and im-
Look at the pictures and read the sentences. Pay attention to the words in bold.
The prefixes non-, dis-, un-, mis-,
in- and im- usually express the
opposite meanings of the original words.
What do you find from the above pictures and sentences
Activity 1
Prefixes non-, dis-, un-, mis-, in- and im-
non-smoker
What’s the original word
What does “non- ” make the word mean
smoker
disagree
What’s the original word
What does “dis- ” make the word mean
unhealthy
What’s the original word
What does “un-” make the word mean
Look at the pictures and read the sentences. Pay attention to the words in bold.
incorrect
What’s the original word
What does “in- ” make the word mean
agree
healthy
correct
not a smoker
not agree
not healthy
not correct
Activity 2
Prefixes non-, dis-, un-, mis-, in- and im-
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
dislikes
uncomfortable
misplaces
nonstop
Activity 3
Prefixes non-, dis-, un-, mis-, in- and im-
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 talk _________ because their minds are not clear. To get rid of the habit, people need to do some sports and sleep early. A healthy body and a clear mind will make them feel good all day.
improper
uncomfortable
impatient
nonsense
seem v. 好像，似乎
seem to do sth.
好像做某事；似乎做某事
unhealthy adj. 不健康的
be unhealthy for sb. / sth.
对某人 / 某物不健康
empty adj. 空的；无意义的
an empty stomach 空腹
stomach n. 胃
have a stomachache
胃痛；肚子疼
living n. 生活方式 adj. 生活的
nonsense n. 胡扯；谬论；胡言乱语
talk nonsense 胡说八道；说废话
improper adj. 不正确的；不适当的
be improper for 对…… 不合适
clearly adv. 明显地；清楚地，清晰地
sleepy adj. 困倦的；瞌睡的
feel sleepy 感到困倦
worse adj. 更差的；更糟的
what’s worse 更糟糕的是
rid v. 摆脱
get rid of 摆脱；除去
Activity 1
need to do/don’t need to do/needn’t do
Read the conversation. Pay attention to need.
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.
Activity 1
need to do/don’t need to do/needn’t do
Read the conversation. Pay attention to need.
need to do
I need to get some sleep now. / You need to take care of yourself.
needn’t do
You needn’t stay up.
Let’s split the “need” structures.
Discuss with your partner what each means.
Activity 1
need to do/don’t need to do/needn’t do
Read the conversation. Pay attention to need.
Quick Practice!
情境 1：You are tired. ______ (have a rest).
情境 2：You finished homework. ______ (do it again).
Use “need to do”or “needn’t do”to complete.
Share your answers with the class.
一、作实义动词
基本用法：意为 “需要”，有人称、时态和数的变化， 后接名词、代词、动词不定式或动名词等作宾语。
接名词或代词：例如 I need some water. 我需要一些水。
接动词不定式：常用于 “sb. need (s) to do sth.” 结构，表示 “某人需要
做某事” 。
比如 He needs to finish his homework before dinner. 他需要在晚饭前
完成家庭作业。
need 的基本用法
接动名词：“sth. need (s) doing” 结构， 此时动名词主动形式
表示被动意义。
例如 The bike needs repairing. 这辆自行车被需要修理。
否定形式和疑问形式：否定形式要借助助动词 “don’t/doesn’t/didn’t”，
疑问形式要借助助动词 “do/does/did” 。
比如 Do you need to go now 你现在需要走吗？；He doesn’t need to
buy a new book. 他不需要买一本新书。
need 的基本用法
二、作情态动词
基本用法：意为 “需要；必要”，没有人称、时态和数的变化， 后接动词原形， 通常用于否定句和疑问句中。
否定句： “needn’t do sth.” 表示 “不必做某事”。
例如 You needn’t worry about him. 你不必担心他。
need 的基本用法
疑问句：其疑问形式是将 “need” 提到主语前面，肯定回答用 “must”，
否定回答用 “needn’t” 。
比如 Need I finish the work today 我今天需要完成这项工作吗？肯定
回答 Yes, you must. 是的，你必须完成。；否定回答 No, you
needn’t. 不，你不必。
need 的基本用法
Activity 2
need to do/don’t need to do/needn’t do
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 girl 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
Activity 3
need to do/don’t need to do/needn’t do
Read the sentences and circle the correct words.
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.
1.
2.
3.
4.
5.
1. You ______ worry about your son. He can take care of himself.
A. need B. needn’t C. needs D. doesn’t need
2. —______ I clean the classroom now
—No, you ______. You can do it tomorrow.
A. Need; mustn’t B. Must; needn’t C. Need; needn’t D. Must; mustn’t
3. The flowers in the garden need ______ often.
A. water B. watering C. to water D. waters
4.He ______ to go to school early every day.
A. need B. needs C. needed D. needn’t
5. They don’t need ______ so much food for the party.
A. buy B. buying C. to buy D. bought
一、单项选择
B
C
B
B
C
1. We need _________ (plant) more trees to protect the environment.
2. You needn’t _________ (come) to the meeting. It’s cancelled.
3. The room is very clean. You don’t need __________ (clean) it again.
4. The car needs ________ (repair). It makes a strange noise.
5. She ___________ (not need) to get up early on weekends.
二、用所给单词的适当形式填空
to plant
come
to clean
repairing
doesn’t need
1. 你不必今天完成所有的工作。
You ______ ______ ______ finish all the work today.
2. 我们需要每天练习说英语。
We ______ ______ ______ English every day.
3. 这辆自行车需要修理。
The bike ______ _________.
三、根据汉语意思完成句子
don’t
need
to
need
to
practice
needs
repairing
常见前缀：non-(non-smoker)、
dis-(disagree)、un-(unhealthy)、
mis-(misplace)、in-(incorrect)、
im-(impossible)
用法：加原词前变反义，不改变
词性
一、否定前缀（表 “不/非/错误”）
二、“need” 的核心用法
类型 结构
实义动词 sb. need(s) to do sth.
实义动词
sth. need(s) doing
否定 （实义） don’t/doesn’t need to do
情态动词 needn’t do sth.
情态动词 （疑问） Need sb. do sth.
1.Remember the usage of "need".
2. Finish the exercises.

展开更多......

收起↑