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(共13张PPT)
Unit 4 Helping out
Understanding ideas (语法学习)
册 次：八年级下册 学 科：英语（外研社版）
A/B/C层
Let’s review.
A/B/C层
情态动词表推测
Read and summarise.
Now find one more sentence with these structures in the reading passage.
It might sound impossible, but Leah didn’t give up.
A/B/C层
Read and summarise.
may / might:
当我们想表达可能发生某事以及某人可能做某事时，可以用may / might表示。
在表示现在或将来的可能情况时，might表示的可能性比may表示的可能性要小一些。
can / could:
can和could除了表示“能够，可以”等意义之外，还可以表示对现在或将来的推测，意为“会，可能”。但can表示推测时，往往用于否定句和疑问句。用于疑问句时，can比could表示的可能性要大；用于否定句时，cannot (can’t)表示“不可能”。could则可用于肯定句、否定句和疑问句。
must:
must也可以表示猜测，意为“一定，肯定”，通常只用于肯定句。
Complete the sentences with must, may or can.
must
may
can / may
A/B/C层
Look at the pictures and complete the dialogues with the correct form of the modal verbs.
A/B/C层
must
may
can
can’t
can
Let’s role-play.
A层
Create a dialogue and role-play. Remember to use correct modal verbs.
A: Our community needs volunteers. How about signing up
B: Good idea! What can we do to help
A: We could clean the streets to make the community tidier. We may also help the elderly cross the road safely.
B: Sounds great! The community must become tidier! And the elderly may feel cared for, too!
Sample
B/C层
Choose a dialogue and role-play.
Let’s role-play.
Work in pairs. Discuss things to do to help people around you.
A层
Work in pairs. Discuss things to do to help people around you.
B/C层
Sample
Homework
A层
Share your story of helping people around you with your family members or friends, and talk about what helping others means to you.
Homework
Summarise your story into a paragraph. Please include:
1) Who needs your help
2) Why do they need help
3) What can you do to help
B/C层
谢谢观看
2026

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