Unit 6 When was it invented Section A 1a -2c 导学案2023-2024学年人教版九年级英语全册

九年级全册

Unit6 When was it invented?

【学习目标】

本单元围绕“发明”这一话题，学习了解一些重要发明的历史，教学一般过去时的被动语态。

Section A的重点是培养学生运用被动语态的意识，掌握更多的动词过去分词形式。

Section B依然围绕发明创造这个话题，要求学生继续学习巩固相关的内容和语言知识。同时让学生学习使用思维导图，以加深对文章的理解和对知识的记忆。

 

【重点难点】

一、重点

1.掌握本课时重点单词，短语和句型。

2.学会一般过去式的被动语态。

二、难点

明白主动语态与被动语态的区别，并能正确使用一般过去时的被动语态。

 

Period 1  Section A (1a-2c)

【课前任务】

一、核心单词

1.style  n. ____________2. project   n.____________  3.pleasure  n. ____________     4. website  n._________

5.mention  v._________ 6. pioneer   n.  ___________            7.list  v./ n.___________                  

二、常考短语

1.the             of the shoes 鞋的款式

2.in our              在我们的日常生活中

3.                     electricity靠电运作

4.be            for   被用作……                                                 

三、典型句子

1. 我认为你没道理，让我再考虑考虑。

 I don’t think ____________________ . Let me think it over again.             

2.有特殊鞋跟的鞋子是用来改变鞋子的样式。

The shoes with special heels are used for changing_________________the shoes.

3.在我们的日常生活中，水和空气最重要。

Water and air are the most important things_________________.

4.-------这台机器怎么运作？   --------它靠电力运行。

-------How does this machine work?

-------It _________________.

 

【课中任务】

一、持续默读（SSR）词数：274      建议阅读时间：(T1m,S5m)

Scientists in Britain and the United Sates have made a new kind of enzyme(酵素) that eats plastics(塑料). With its help, plastics can be turned into smaller parts and go away quickly. Scientists believe that, in the future, it could solve the problem of plastic pollution.

The enzyme is able to break down PET, a form of plastic. PET was first made in the 1940s and is now widely used to make plastic bottles. It can remain in the environment for many years and pollute large areas of land and water. So it has always been a headache to deal with the waste from PET and other plastics.

       The researchers made the discovery(发现) while examining the structure of a natural enzyme in Japan. They

found that the natural enzyme was helping to break down PET plastics. So, they decided to make small changes to the enzyme by adding some amino acids(氨基酸). It made the natural enzyme’s plastic-eating abilities work faster and better.

       John McGeehan, one of the lead researchers, said, “We’ve made an improved enzyme. It’s better than the natural one. And we are trying to make more improvements to it.” He went on, “The enzyme is not harmful to humans or animals, and it is friendly to the environment. So we are considering putting it into wider use.”

       The team is now trying to make the enzyme break down PET in large quantities(大量地). “We’ll see that the plastic pollution may be stopped with this technology. However, there is still a long way to go,” John McGeehan added.

1.Circle the key words.

2.Underline the useful sentences.

3.Say something about the passage.

____________________________________________________________________________________________________________________________________________________________________________________                                                                                                              

二、课中导学

Step1 Leading in(T2m,S2m)

1．Greeting:Greet the class . Then look at a picture and discuss:

What are they?

What are they made of?

What invented sky lantern?

2．Ask and answer in pairs:Show pictures of the things.Discuss with the students，like this：

A:What was…invented? It was invented in…

B:Who invented it?   It was invented ….

3．T：Today we are going to talk about these inventions.

Which one of these inventions was invented first？Can you guess?

 

Step2 Work on 1a（T1m,S1m）

Look at the things below. In what order do you think they were invented? Discuss them with your group. Then number them [1-4].

 

Step3  Listening :Work on 1b. (T2,S3m)

1.Look at these inventions. Do you know when they were invented.

2.Listen and match the inventions with the dates.

_____  1876

_____  1885

_____  1927

_____  1971

3.Play the recording once more and students read after the teacher.

 

Step4 Work on 1c. (T1,3m)

1.Student B, cover the dates. Student A, ask  Student B when the things in the picture in 1b were invented. Then change roles and practice again.

 Example:    A: When was the telephone invented?

B: I think it was invented in 1876.

2.ask and answer:There are many kinds of modern inventions. Can you say some out?

 

Step5 Listening :Work on 2a & 2b (T2,S2m)

1.Listen and number the inventions [1-3] in the order you hear them. (2a)

2.Look at these creative inventions. What are they? What are they used for? Let’s listen.(2b)

3.Complete the chart.

 

Step6 Post-listening (T1,S2m)

The second invention is a hot ice-cream ______. It runs on ____________  and becomes hot. It’s ______ for serving really _______ ice-cream.   

The last invention is shoes with special  _____. People can move the heels _____ and ______. You can _____