资源简介

(共18张PPT)
Unit 4 Helping out
Understanding ideas Grammar
2026新外研版八下
Lead in
Watch the video and answer the questions.
What grammar rule can you notice
情态动词（Modal Verbs)：Can, May, Should, Will, Might, Would, Shall, Must, Could.....
情态动词表推测
Read and summarise.
What can you find
Now find one more sentence with these structures in the reading passage.
It might sound impossible, but Leah didn’t give up.
情态动词：表示说话人对动作的态度、语气（如：能力、许可、必须、推测），无人称和数的变化，后面直接加动词原形。
类别 情态动词 含义 可能性程度 用法说明 例句
肯定推测 must 一定、肯定 100%（最高） 有明显依据的推测，仅用于肯定句 The light is on. He must be at home.
may 也许、可能 约 50% 无十足把握，语气较肯定 He may need help.
might 或许、大概 低于 may 语气更委婉，可能性更低 It might sound impossible.
can 有时会、理论上可能 普遍可能性 表示普遍 / 理论上的可能性 It can be very cold here in spring.
否定推测 can’t 不可能 0%（最低） must 的否定推测不用 mustn’t，而用 can’t He can’t be in the classroom.
Read and summarise.
情态动词结构化梳理：
Complete the sentences with must, may or can.
must
may
can / may
1. 肯定推测（100%）
2. 表可能性推测（约 50% 不确定）
3. 表许可（允许做某事）
情态动词 功能 例句
must 肯定推测（100%） You must be tired.
may 可能性推测 / 许可 It may rain. / You may go now.
can 许可 / 能力 / 理论可能 You can use it. / I can swim.
情态动词+动词原形
Look at the pictures and complete the dialogues with the correct form of the modal verbs.
What problems do they meet What kind of help do they need
Help needed: He needs someone to help him carry the boxes (give him a hand).
Problem: The man is carrying a lot of heavy boxes, and it is very hard for him.
must
Look at the pictures and complete the dialogues with the correct form of the modal verbs.
What problems do they meet What kind of help do they need
Help needed: She needs someone to ask if she is lost and help her find the way (give directions or guide her).
Problem: The woman looks lost—she doesn’t know where to go or how to get to her destination.
must
may
can
Look at the pictures and complete the dialogues with the correct form of the modal verbs.
can’t
can
What problems do they meet What kind of help do they need
Problem: Lily has the flu and has to stay at home, so she will miss the important lesson and can’t take notes.
Help needed: She needs her classmates to share their lesson notes with her so she can catch up on the important content.
Think and share
Do you think it takes a lot of effort to help people around us What can you learn from Leah’s story and these dialogues
No, it doesn’t take a lot of effort to help people around us. From Leah’s story and these dialogues, we can learn that even a small act of kindness can make a big difference to others and bring them joy and support.
Let’s role-play.
Our community needs volunteers. How about signing up
Good idea! What can we do to help
Let’s role-play.
We could clean the streets to make the community tidier.
Let’s role-play.
We may also help the elderly cross the road safely.
Sounds great! The community must become tidier! And the elderly may feel cared for, too!
Work in pairs. Discuss things to do to help people around you.
How can we help people around us
Listen and write.
It’s about...
He finds it a challenge to...
He needs help...
We can help...
Work in pairs. Discuss things to do to help people around you.
Lin Peng.
We can help him find some material for the presentation and practise public speaking with him.
He finds it a challenge to prepare the English presentation and may feel nervous about it. He needs help with his homework.
Listen again and check your answer.
A: Do you have time after school today
B: Yes, I do. What’s up
A: Well, it’s about Lin Peng. He needs some help with his homework.
B: What’s the matter
A: He finds it a challenge to prepare the English presentation. He may also feel nervous about it. Perhaps we could help him find some material.
B: No problem. And we can also help him practise public speaking.
A: OK, then. I’ll let him know. He must feel happy with our help.
Howework
Must do:
师生共同梳理：语篇主旨 + 情态动词表推测用法。
整理语法笔记，完成配套练习。
Choose to do:
（For more information）
写一段 5–8 句关于 “助人” 的短文，正确使用 3 个以上表推测情态动词
Man’s life is limited, but there is no limit to serving the people.
— Lei Feng

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