Unit 5 Grammar 课件 2025-2026学年外研版八年级英语上册

Unit 5 Play by the rules? Understanding ideas (Grammar) read start playing loud music on her phone Mr Smelly Food Please look after your children cover his nose to reduce the smell Review ·They cross the road at the zebra crossing to keep safe. ·He exercises every day in order to keep fit. ·She gets up early every morning so as to catch the first bus. Presentation Read the sentences and find out what they have in common. To express purposes. What do the words in bold mean? They all mean “为了……”. actions purposes What is the usage of the words in bold? Infinitive of purpose: ... + to / in order to / so as to do sth. Read the reading passage and find more sentences with these structures. ·They cross the road at the zebra crossing to keep safe. ·He exercises every day in order to keep fit. ·She gets up early every morning so as to catch the first bus. I got on the train to go home. I went to a quiet area in order to read. I covered my nose so as to reduce the smell coming from Mr Smelly Food. I covered my ears in order to block the noise coming from Rock Girl. I turned around so as to see the other passengers’ faces. actions purposes Presentation Read the sentences and summarize the rules. ·He exercises every day to/in order to/so as to keep fit. ·To/In order to keep fit, he exercises every day. ·She spoke softly ‌in order not to/so as not to‌ wake the baby. to in order to so as to Position at the beginning or in the middle of a sentence Negation / at the beginning or in the middle of a sentence in the middle of a sentence in order not to so as not to 在日常交流中，使用 to 表示目的最简洁自然， 而 in order to 和 so as to 可突出目的性，适合强调 意图的语境。 Presentation 除了作目的状语外，根据表达的需要，动词不定式还可以作原因状语和结果状语等。 一、动词不定式作原因状语 功能：解释主句动作或状态发生的原因，常接在情感类形容词（如 happy， sad， surprised等）或评价类形容词（如 kind， clever等）后。 结构：主语+be动词+情感/评价类形容词+动词不定式（表原因） 例句：He was excited to get his birthday present.他很激动，因为他收到了生日礼物。 Extension 二、动词不定式作结果状语 功能：表示主句动作导致的结果，常与副词 enough 或 too…to 结构搭配，或隐含自然因果关系。 结构：主语+be动词/谓语（动作）+形容词/副词+enough+动词不定式（表结果） 主语+be动词/谓语（动作）+too+形容词/副词+动词不定式（表否定结果） 例句：The boy ran fast enough to catch the bus.这个男孩跑得很快，足以赶上公交车。 The box is too heavy to lift alone.箱子太重了，一个人抬不起来。 1.语法点单句特训。 （　　）6.Tom bought a camera 　　　　photos during his trip.  A.take　 B.to take　 C.taking （　　）7. 　　　　finish the project on time， we worked late.  A.So　 B.To　 C.For B B Practice （　　）8.Lucy practises playing the piano every day 　　　　win the competition.  A.to　 B.for　 C.in order （　　）9.He closed the window 　　　　the cold wind.  A.avoiding　 B.to avoid　 C.avoid （　　）10.　　　　 learn Spanish， she downloaded a language app.  A.In order to　 B.So　 C.For A B A 2.按要求改写句子。 要求：用动词不定式合并两个句子，使其包含目的状语、原因状语或结果状语。 1.She studies hard.She wants to get good grades. She studies hard 　　　　　　　　　　　 　　.  2.Because he saw his friend.The boy was very happy. The boy was very happy 　　　　　　　　　　 　　.  to get good grades to see his friend Practice 3.The old man is so tired.He can’t walk any farther. The old man is too tired 　　　　　　　　　　　　.  4.I turned off the lights.I didn’t want to waste electricity.（用否定式） I turned off the lights 　　　　　　　　　　　　　　　　　　.  5.She took out a notebook.She wanted to write down ideas. 　　　　　　　　　　　　　　　　　　， she took out a notebook.  to walk any farther so as/in order not to waste electricity To/In order to write down ideas Practice 3.Rewrite the sentences with to, in order to and so as to. 1. People wear seat belts in cars. People want to stay safe on the road. _________________________________________________________ _________________________________________________________ 2. Sally arrived at the train station before 6:00 am. She needed to catch the earliest train. _________________________________________________________ _________________________________________________________ 3. I listened carefully in maths class. I hope to improve my grades. _________________________________________________________ _________________________________________________________ People wear seat belts in cars to / in order to / so as to stay safe on the road. Sally arrived at the train station before 6:00 am to / in order to / so as to catch the earliest train. I listened carefully in maths class to / in order to / so as to improve my grades. actions purposes Practice Dear Story Aunt, 1 ______ (I’m writing, share a touching story). Yesterday, ² ______ (I left my flat, go to work). However, I found my favourite flowerpot broken. ³ ______ (I picked up the pieces, clean up the mess). Then I saw a note. It was from a boy. He said he broke the flowerpot while playing basketball. ⁴ ______ (he wrote the note, say sorry to me). He also left his phone number with some money. His honesty made me respect him. Telling the truth isn't always easy. However, he followed the rules in his heart. I’m ⁵ ______ (sharing my story, spread some happiness). In the story, we can see the kindness in small things. Best wishes, Ms Yu, from Wenzhou 1. I’m writing to / in order to / so as to share a touching story 2. I left my flat to / in order to / so as to go to work 3. I picked up the pieces to / in order to / so as to clean up the mess 4.Complete the letter to Story Aunt using the notes in brackets and the grammar you have learnt. Practice Dear Story Aunt, 1 ______ (I’m writing, share a touching story). Yesterday, ² ______ (I left my flat, go to work). However, I found my favourite flowerpot broken. ³ ______ (I picked up the pieces, clean up the mess). Then I saw a note. It was from a boy. He said he broke the flowerpot while playing basketball. ⁴ ______ (he wrote the note, say sorry to me). He also left his phone number with some money. His honesty made me respect him. Telling the truth isn't always easy. However, he followed the rules in his heart. I’m ⁵ ______ (sharing my story, spread some happiness). In the story, we can see the kindness in small things. Best wishes, Ms Yu, from Wenzhou 4. He wrote the note to / in order to / so as to say sorry to me 5. sharing my story to / in order to / so as to spread some happiness Complete the letter to Story Aunt using the notes in brackets and the grammar you have learnt. Practice If you were Story Aunt, how would you reply to the letter? Use to/in order to/so as to to express your purpose of replying. Dear Ms Yu, Best wishes Story Aunt I’m replying to your letter to thank you for sharing this heart-warming story. It shows the beauty of honesty. I’ll spread it in order to let more people feel the kindness. Product Look at the picture and describe the rule-breaking behaviour in it. The lady in the picture is littering. Littering is not allowed in public places. She should follow the rules and throw the garbage into the dustbin. Product Make a story of following rules according to the picture and the questions. Last Saturday afternoon, I went for a walk in the park. I saw a lady throw a banana peel on the ground. Littering is not allowed in the park. So I walked up to her and told her to follow the rules and throw the garbage into the dustbin. The lady felt very ashamed after hearing my words. She picked up the banana peel and threw it into the dustbin. From this experience, I have learned that rules are important in life. · When did the story happen? · Where did the story happen? · What did you do? · What have you learnt? Product Work in pairs. Share a story of following rules. Use the words and expressions from the reading passage and the Useful expressions to help you. Useful expressions ·Last..., I... ·Please... ·I love doing... in order to... ·People have to... ·I tried to... ·This rule is useful because... ·From this experience, I have learnt that... A story about rules When did the story happen? What did you do? Where did the story happen? What have you learnt? Product A: What’s your story? When and where did it happen? B: Last Wednesday, I was waiting in line at the bus station. A: What happened? B: The bus came. But a boy suddenly cut in line and the old man before me nearly fell over. A: That’s terrible. What did you do? B: I helped the old man get on the bus. Then I told the boy to follow the rules. The boy said sorry to the old man. A: You did a good thing. B: Well, I’ve learnt that rules are important in life. Make a conversation Sample Make and share a story of following rules. Use infinitives of purpose to, in order to and so as to. 2 1 After learning this lesson, I can Summary Homework 1. Write a passage about your story of following rules. 2. Share your story of following rules with your family members. Bye-bye! $