Unit3 Is this your pencil 教案
Unit3 Is this your pencil?
教案 赵亚倩
一、教学内容：Section A (1a-2d)
二、教学目标：
1. 知识目标：
1) 能掌握下列词汇: pencil, book, eraser, box, pencil box, schoolbag, dictionary, his,
hers, mine, yours, teacher, excuse me, You're welcome.
2. 技能目标：
1) 能掌握以下句型： ① — Excuse me. Is this/that…? — Yes, it is. / No, it
isn’t. ② — Excuse me. Are these/those…? — Yes, they are. / No, they aren't. ③
What about …?
2) 能初运用名词性物主代词mine, yours, his, hers；理解名词性物主代词和形容
词性物主代词在用法上的区别。
2. 情感目标： 通过“识别物品的所属”的学习，让学生们学会爱惜自己的学习
物品，养成照看好自己的物品的好习惯，发现不属于自己的物品，应及时归还物
品的主人。
三、教学重难点
1. 教学重点：
1）句型： ① — Excuse me. Is this/that …? — Yes, it is. / No, it isn’t.
② — Excuse me. Are these/those …? — Yes, they are. / No, they aren’t.
③ What about …?
2. 教学难点：能运用名词性物主代词mine, yours, his, hers；理解名词性物主代词
和形容词性物主代词在用法上的区别。
四、教学方法：情景教学法，任务型，讲练法
五、教学准备：PPT
六、教学课时：一课时
七、教学设计
Ⅰ. Warming-up and revision
1. Greeting the Ss. Good morning! /Hello!/ Hi! ...
2. Let some Ss show their family photo.
Ask: — Is this your…? — Yes, she/he is. /No, she/he isn’t.
— Are these/those your…? — Yes, they are./ No, they aren’t.
3. Collect some things (pen, ruler, cup, book, pencil…) from the students and ask:
What’s this in English? What’s that in English? It’s a/an …
Ⅱ. Presentation
1. Pretend that you don’t know whose these things are and ask A: “Is this your
book?”
And lead him/her to answer: “Yes, it is. It’s mine.”
Then take another one and ask its owner: “Is this your schoolbag?”
Help him/her to answer: “No, it isn’t. It’s his.”
Have the students ask and answer in pairs.
Then ask them to act their dialogues out.
— Is this your book? — Yes, it is. It’s mine.
— Is this your schoolbag? — No, it isn’t. It’s his/hers.
2. Tell Ss: my book = mine; his book = his; her book = hers
Ⅲ. Listening
T: Now please listen to the three conversations, the first time you only listen. Then I
play again. And this time you listen and number the conversations.
Ⅳ. Pair work
1. Get the students to work in pairs to practice these conversations.
2. Ask them to practice in groups. Walk around the classroom to check pronunciation
and intonation. Then call some groups to perform their conversations in front of the
class.
Ⅴ. Listening
1. Work on 2a.
T: Please look at the pictures in 2a. Can you say their English name?
S1: This is … S2: This is … S3: …
T: Now please take out the objects in 2a and put them on the desk. You will listen to a
dialogue and please pick up the things you hear. Let’s see who will do fastest and best.
(Play the recording for the students to listen.)
2. Work on 2b.
T: Now please read the words. One holds the things, the others read them aloud one
by one. (One student holds the things, and the other students say the words aloud.)
Ⅵ. Pair work
1. T: Now please practice the conversation with your partner.
2. Ask some pairs to act out the dialogue in front of the class.
3. T: Now collect some more school things from your classmates. Then make a new
conversation with your partner. Then practice your conversation.
4. Ask some pairs stand up and act out their dialogue using the school things they
collected.
Ⅶ. Presentation
1. Take a pen and a dictionary from Alice.
T: Is this your pen, Alice? S: No, it isn’t. It’s his.
T: This is not Bob’s pen. It’s Alice’s pen.
(Write Alice’s, Bob’s on the blackboard. Tell Ss this knowledge is “名词所有格”，It is
the same as my, his, her, your ...)
Ⅷ. Summary
1．学习了关于文具的新单词
2．句型：—Is this your…？—Yes，it is.\No it isn’t.
3．名词性的物主代词以及名词所有格
Ⅸ.Homework:
1. Recite the new words and sentences
2. Finish the exercise book
板书设计
1. New words and expressions:
pencil, book, eraser, box, pencil box, schoolbag, dictionary, his, hers, mine, yours,
teacher, excuse me
2. Sentence structures:
— Excuse me. Is this/that …? — Yes, it is. / No, it isn’t.
— Excuse me. Are these/those …? — Yes, they are. / No, they aren’t.
3．my book = mine; his book = his; her book = hers
苏教牛津译林版三年级英语下册《Unit 3 Is this your pencil》word第二课时教案
T What’s this/that?(手指着学生的文具）
SIt’s apen,pencil,crayon,ruler,rubber,pencil case...
T Is this your/ his/ her...?
S Yes it is/ No, it isn’t.
a.Watch the cartoon and answer the question.
S It’s a lunch bo.
教授lunch bo
b. Watch the cartoon again and answer the questions.
1.What’s the meaning of“Where”?
T Here you are.
S2 Than you.
2. Review story time
T Mie’s friends are very helpful. They loo for his pencil for Mie.Let’s read the story time.
1）read after the tape
Homewor
1. Recite story time 2. Read cartoon time 3. Recite new words and write 2+1
板书
Unit3 Is this your pencil?
Is this/that ...? luch bo
Yes, it is Where’s ...?
A.什么B.哪里C为什么
2)Where’s Sam’s lunch bo?
A. It’s over there. B. It’s here.
初中英语《Unit3Isthisyourpencil》单元教学设计以及思维导图
it's not my book. It's not
words together
mine.Then lead in the
words his and her in the
same way.Write the following onthe Bb: Is this/that your„？ Yes，it is. It’s „/No，it isn’t. It’ s „ Are these/those your„？Yes，they are.They are„/No，they aren’t.They are„
Students’ activity
Lead-in
Ask Ss the names of
different school things by
say “What’s this in
answer the
English?” Then get the
question one by
students say：It's a book.But one and read the
学生学习成果及评价： 1. 学生口语表达能力 2. 听力理解水平
评价要点
3.阅读理解能力 4. 书面表达能力
评价方法：教师口头评价 学生互评 学生组 间评价 教师评价小组
Activity 2b
Play the tape again and ask the students to complete the conversation with the words in the box.
Listen to the tape and complete the conversation with the words in the box.
山东省临沂市青云镇七年级英语上册《Unit3 Is this your pencil》教案1
七年级英语（Go for it ！）Unit 3 Is this your pencil ?教学目标:（一）知识目标Vocabulary: pencil, pencil box, book, eraser, notebook, dictionary, baseball,computer,game, excuse me.... Thank you for..., ask ...for..., a set of Patterns: ---Is this your pencil? ---Yes, it is. It’s mine.---Are these your books? ---No, they aren’t. They’re hers. （二）能力目标1.能正确运用名词性物主代词：his,mine,hers,yours.来确认物主关系。
2.能正确运用一般疑问句“Is this your pencil? ”确认物主关系。
3.学会根据场景询问物品的所属，以及学会写寻物启事和招领启事。
（三）情感目标1.培养学生如何运用礼貌的语言和姿态打扰别人和寻求帮助、致谢。
教学方法： 1. Task-Based Language Teaching2.The oral approach3. The Group work教学媒体:多媒体，录音机, 投影仪, 实物等课时分配:Period 1: （Section A：1a---2d）Period 2 （Section A：Grammar focus---3c）Period 3 （SectionＢ：1a--- 1e）Period 4 （SectionＢ：2a---Self check）教学过程Period 1Teaching contents: Section A1a--- 2dTeaching procedures:Step l 1.Warming up : Prepare a box of school things before class and ask the students to learn to demonstrate things. 2.Learn the new words.Step 2: (1a ) 1.Look and find . 2.Match and discuss.Step 3: 1b1．Listen and number 2．Check the answers3．Read the conversations together. Then read them in pairs.4．Translate and explain . Is this your ...? or Is that your ...? Step 4: 1c Practice T: Mary, is this your pen? S: No, it isn’t. It’s her pen. Step 5: 2a 1.Listen and check. 2.Check the answers .Step 6: Section A 2b1．Listen and complete 2．Check the answers .3．Read the conversationStep 7: Section A 2c1.Read the conversation together? 2．Practice .“Who would like to practice in class? ”Step 8: Section A 2d Role-play the conversation.Step 9: SummarizeLet’s summarize what we learnt in this period. Show them on the PPTStep 9: Homework1．Copy the words in activity 1a and the sentences in grammar box.2．Read the tape script of activity 2a and 2b.教后反思：Period 2Teaching contents: Grammar focus---3cTeaching procedures:Step 1 ( 3a )1．Explain .Let’s go into activity 3 on page 15. How many things are there?2．Read and learn the Grammar Focus.a. Let’s read the conversation together.b. Translate it into Chineseand make some more sentences.3．PracticePractice the conversation with the five things in the picture. please work in pairs. Step 3: 3b1.Let’s play the game in groups. Please take out one thing from the box and ask your group members “Is this your ...?” If he / she answers “Yes, it is.” that means you win. If he / she answers “No, it isn’t.” that means you fail and have another try.2.Ask some to act out .Step 4: Play gamesPut some things into the teacher’s box. Then take one thing out of the box and find the owner. You only have two guesses!Let’s summarize what we learnt in this period.Step 5 Exercise in class. Do some exercise <同步> p27--28. Then check the answers. Step 6: HomeworkTry to memorize the conversation in 3.教后反思：Period 3Teaching contents: Section B 1a---1eTeaching procedures:Step l: Revision Ask the questions and the others answer Step 2: Section B 1a1．Look and match 2．Check the answers . Let’s check the answers now. 3．Introduce them to your friendsStep 3: Section B 1b1．Read : look at the conversation in 1b. Read it again. But this time, boys read as A and girls read as B.2．Ask and answerStep 4: Section B 1c1．Listen and circle 2．Check the answersStep 5: Section B 1d1．Listen 2．Listen and fill the chart 3．Check the answers4．Read the tape scripta. Let’s read the tape script together. Then read the tape script in pairs?b.Who would like to read in class?Step 6: Section B 1eTask－Whose are they? ---T: No. It’s his pencil case.Step 7: SummarizeStep 8: HomeworkMake a new conversation according to the section B 1b.教后反思：Period 4Teaching contents: Section B 2a---Self checkTeaching procedures:Step 1: Revision :Make conversations with the school things 2．Dictation .Step 2: Section B 2a1．Write the things you lose easily.First let’s look at the title please. Just guess.--- Notices means “通知”。
【人教版】七年级英语上册优秀教案：Unit3IsthisyourpencilPeriod3教案
Unit 3 Is this your pencil?Period 3 (Section B 1a–1e)【教学目标】●知识目标1. Master the new words and useful expressions.2. Master the target language.●能力目标1. Be able to identify things and spell words.2. Develop students’ listening skills and communicative competence.●情感目标Try to cultivate students to form the good habit of cooperation. 【教学重难点】●重点1. Master the new words and useful expressions.Words: baseball, watch, computer, game, card, notebook, ring, bag Phrases: ID card, computer game2. Master the target language:—What’s this? —It’s a watch.— How do you spell it? — W-A-T-C-H.3. Be able to identify things and spell words.4. Improve students’ listening and speaking skills.●难点1. Improve students’ listening and speaking skills.2. The usage of target language.【教学准备】A projector, a tape recorder, some things, handouts.【教学方法】任务型教学法、情景交际法、自主学习与合作学习相结合【课时安排】One period【教学过程】Step 1: Greetings and revision1. Greeting the Ss. Check the homework.2. Review the school things we learned in Section A. Let Ss say the school things they have.3. Pick up some school things from the students’ desk and ask about them. (Using this, that, these, those) Let other students answer the questions. They must say the owner the things.T: Is this Li Mei’s ruler?Ss: Yes, it is. It’s hers.T: Is that Li Mei’s pencil?Ss: No, it isn’t. It’s Wu Ming’s.T: Are these Li Mei’s pens?Ss: Yes, they are. They’re hers.T: Are those Li Tao’s books?Ss: No, they aren’t. They’re Zhang Bin’s.…Step 2: Lead-inShow a pen, ask and answer like this:T: What’s this in English?Ss: It’s a pen.T: How do you spell it?Ss: P-E-N, pen.T: Yes, thank you.Show some other things, and have students work in pairs to make conversations like this....Step 3: Presentation1. Teach activity 1a(1) Teach the new words.(2) Ask the students to read the words and expressions in 1a one by one.Correct mistakes ifthere is any.(3) Ask them to look at the picture carefully so that they can see how many things there arein the picture. Match the words with the things in the picture.(4) Check the answers.Answers: 1.baseball e 2.watch b puter game h 4.ID card a 5.key i8.pen d 6.notebook g 7.ring c 9.bag f2. Teach activity 1b(1) T: Now please work with your partner, practice the conversation in 1b. Use the picturesin 1a.(2) Students practice the conversation. As students work, the teacher moves around and offersome help if needed.(3) Invite some pairs to act out the conversation.Step 4: Practice1. Teach activities 1c(1) T: Listen to the conversation. Pay special attention to the names of objects. You willhear some of the names, not all of them. Circle on the picture each item whose name is mentionedin the conversations.(2) Play the recording for the first time. Ask students to listen carefully and circle the items.(3) Play the recording for the second time. Ask them to check the answers themselves.(4) Collect the answers and correct mistakes with the class.2. Teach activity 1d(1) T: Please look at the two pictures in 1d. One is Linda, and the other is Mike. Listen to the conversations again. This time you will pay attention to the things Linda and Mike are looking for. Then write down the names of the things under each person’s picture.(2) Play the recording for the students to write down the words.T: Well, what is Linda looking for?S3: …T: What about Mike? What is he looking for?S4: …(3) Check the answers with the class.Step 5: ConsolidationTeach activity 1f(1) Ask students to read through the instruction so that they can know how to play this game.(2) Follow the instruction. Ask students to make conversations using the things in 1d in pairs.(3) Leave the students several minutes to do this task.(4) Move around the room, offering help as needed.(5) Invite some pairs to act out their conversations for the whole class.【课堂小结】In this period, we’ve mainly consolidated how to identify things and spell words. And we’ve also improved our listening and speaking skills.【课后作业】1. Practice the target language.2. Preview the next period.。
最新人教新目标七年级上册英语Unit 3 Is this your pencil全单元教案
Is this your pencil？
Section A 单词 pencil n. 铅笔 book n. 书 eraser n. 橡皮 box n. 箱；盒 schoolbag n. 书包 dictionary n. 词典；字典 his pron. 他的 mine pron. 我的 hers pron. 她的 excuse v. 原谅；宽恕 me pron. (I的宾格）我 thank v. 感谢；谢谢 teacher n. 老师；教师 about prep. 关于adv. 大约 yours pron. 你的；你们的 for prep. 为了；给；对 help v. & n. 帮助；援助 welcome adj. 受欢迎的
短语 pencil box铅笔盒；文具盒 excuse me劳驾；请原谅 What about…? (询问消息或提出建议）……怎么样？……好吗？ thank you for…为……而感谢你（们）
句型 1. Excuse me, Grace. Is this your pencil? 打扰了，格雷丝。这是你的铅笔吗？ 2. —Are these your books? 这些是你的书吗？ —No, they aren’t. 不，它们不是。 3. —What about this dictionary? 这本字典（是谁的）呢? —It’s Helen’s. 它是海伦的。 4. Is that yours? 那是你的吗? 5. —Thank you for your help, Anna. 谢谢你的帮助，安娜。 —You’re welcome. 不用谢。 Section B 单词 baseball n. 棒球 watch n. 表；手表 computer n. 计算机；电脑 game n. 游戏；运动；比赛 card n. 卡片 notebook n. 笔记本 ring n. 戒指 bag n. 袋；包 in prep. 在……里 library n. 图书馆 ask v. 请求；要求；询问 classroom n. 教室 find v. (过去式、过去分词found/faʊnd/)找到；发现 some adj. 一些；某些pron. 有些；有的 e-mail (=email)v. 给……发电子邮件；用电邮发送n. 电子邮件 at prep. (提供电话号码等时使用）按照；根据；在（某处、某时间或时刻） call v. (给……)打电话 lost v. （动词lose/l u: z/的过去式）遗失；丢失 must modal v. 必须 set n. 一套；一副；一组
人教七年级英语上册Unit 3 Is this your pencil第四课时Section B (2a-2c)教案
人教七年级英语上册Unit 3 Is this your pencil?第四课时Section B (2a－2c)教案重点单词in prep. 在……里library n. 图书馆ask v. 请求；要求；询问find v. (过去式、过去分词found)找到；发现some adj. 一些；某些pron. 有些；有的classroom n. 教室e-mail v. 给……发电子邮件；用电邮发送n. 电子邮件at prep. (提供电话号码等时使用)按照；根据；在(某处、某时间或时刻)call v. (给……)打电话lost v. (动词lose的过去式)遗失；丢失must modal v. 必须重点短语ask...for... 请求；恳求(给予)call sb. at... 拨打……联系某人重点句子1.A computer game is in the school library. 在学校图书馆里有一个电子游戏机。
2．Ask the teacher for it. 向老师要它吧。
3．Call me at 685-6034. 请拨打电话685-6034与我联系。
教学难点能够阅读一些简单的招领和寻物启示,并能获得关键信息一、根据句意及首字母或汉语提示写出单词。
1．There are many books in the library.2．I will help you find your pen.3．Please e-mail (给……发电子邮件) me the details as soon as you can.4．I will call (给……打电话) you tomorrow morning.5．You must hand in your homework this afternoon.二、写出下列画线短语的汉语意思。
1．Ask the teacher for it. 请求；恳求(给予)2．E-mail me at maryg2@. 发电子邮件到……与我联系3．Call me at 685-6034. 拨打电话……与我联系环节1新课导入T：This is a lost and found. There are many things people lose there. And what do people often lose?S1：They often lose their keys.S2：They often lose their umbrellas,pens and socks....设计意图：以图片的形式直观地引入本课时话题,吸引学生的眼球,提高他们的课堂参与积极性。
译林版(三起)三年级英语下册教案Unit 3 Is this your pencil？教案3
Unit 3 Is this your pencil? 教案一、教学目标1.能听懂，会说，会读Yes,it is/No,it isn’t.2.能听懂，会说，发音标准字母r在单词中的读音。
二、教学重点Is this/that your pencil? Yes,it isNo,it isn’t.的正确读音和语调。
三、教学难点字母r在单词中的读音四、教学过程Step 1 Warm up1.Greeting2.Free talk采取chain，drills的形式进行操练，由S1向S2提问，S2向S3提问。
如：T:Is this your pencil?S1:Yes,it is. Is that your pen,S2?S2:No,it isn’t. Is this your ruler,S3?S3: Yes,it is.要求学生迅速反应，准确的问与答。
Step 2.Presentation1.Fun time1)老师简要的介绍游戏的规则：几个学生坐成一圈，其中一个孩子被蒙住眼睛，另外一个孩子把一个文具放到蒙着眼睛的小男孩面前。
被蒙住眼睛的小男孩把布条拿掉，拿起这样文具，开始在一圈学生内寻找物主并用Is this your…?来提问，知道猜到物体的主人。
如：T: Is this your ruler? S1S1:No, it isn’t.T: Is that your ruler,S2?S2:No, it isn’t.T: Is this your ruler,S3?S3: Yes, it is.2)分小组开展游戏，教师巡视，参与游戏并提供帮助。
2.Sound time1)教师示范朗读单词。
2)引导学生听录音跟读。
3)再找几个含有/r/这一音素拼写简单的单词，引导学生试着读出其他单词。
Step 3.Assign work1.抄写新学的单词。
2.熟读课文。
新目标英语初一Unit 3 Is this your pencil 教案
Unit 3 Is this your pencil?一、单元分析本单元的标题为Is this your pencil? 话题为Things in the classroom. 本单元围绕“识别物品的所属”，使学生学会询问物品的主人的基本句型“Is this/that your/her/his pencil? Yes, it is. No, it isn’t.”“Are these/those your/his/her books? Yes, they are./No, they aren’t.”，体会一般疑问句的用法；学习如何写“失物招领、寻物启事”，巩固所学单词的拼写“How do you spell pen? P-E-N.”。
通过以上几个方面的学习，既能提高学生解决问题的能力，又能巩固所学知识。
本单元与第二单元衔接紧密：由this，that的学习过渡到these, those的学习，由指示一个人、物过渡到指示多个人、物，使学生学会区分远近单复数。
同时学习和巩固名词性物主代词的用法。
下面将通过一个表格对本单元的教学作进一步的梳理。
根据《英语课程标准》（实验稿）关于总目标的具体描述，结合第三单元的教材内容，我们分语言知识、语言技能、学习策略、情感态度、文化意识五个方面将本单元的教学目标细化：1）语言知识：单词：学习掌握词汇pencil, pen, book, eraser, ruler, pencil case, dictionary,backpack, baseball, watch, key, computer game, notebook, ring等。
功能：辨认物品的所有者询问物品的归属，以及英语中对应的表达法Is this your pencil?Yes, it is ./ No, it is n’t…etc.语言结构：指示代词：this ,that，these, thoseWhat引导的特殊疑问句Yes/No问句及其简单回答句型How do you spell pencil?2）语言技能：听：能识别不同句式的语调，并能根据语调变化，判断句子意义的变化；能听懂本课学习活动中的问题，做出较得体的回答。
七年级英语上册Unit3Isthisyourpencil教案(新版)人教新目标版.docx
Unit 3 Is this your pencil?The First PeriodSection A (la-2d)I •Teaching aims:1.Knowledge aims:(1)Keywords :pe nci 1, book, eraser, box, school bag, dictionary, his, mine, hers, excuse, mo, tha nk ,teacher,about, yours, for, help, welcome(2)Key phrases:excuse me,thank you for...,pencil box(3)Important sentences:①一Is that your school bag?—No, it isn，t. It" s his.②一Are these your book?一No, they aren" t・They" re hers.2.Ability aims:Learn to identify ownership of the things in the classroom.3.Emotion aims:Make students guess the owners of the things in the classroom.IL Important points:Train students， listening skills.III.Difficult points:Grasp some new words about their school things.IV.Teaching processStep 1 Warming up1.Show some pictures or objects about school things like pen, ruler, cup, schoolbag, pencil...—What? s this in English?—It' s...2・ Work on la.©Read the words in la.②Let students look at the picture in la.(3)Ask students to find out the things in the picture, then match the things withwords・ Tcachot checks the answers with students.④ Let the students read the new words aloud after the teacher .Then remember the new words. Step 2 ListeningWork on lb, 2a and 2b.1・Listen and number the conversations [1-3].2.Listen and check(/) the things you hear.3.Listen again .Complete the conversation with the words in the box.4・Check the answers in lb,2a and 2b・Step 3 PairworkWork on lc and 2c.1.Practice the conversations above with your partner. Then greet your classmates.2.Practice the conversation in 2b. Then make your own conversations using the things in yourclassroom.e.g.—Ts this your school bag?一No, it isn，t.Step 4 Role-playWork on 2d.Let students read the conversation. Then let students role-play the conversation and give them 5minutes to recite it.Language points1.penc订box文具盒pencil box二pencil case注意：box的复数形式是boxeso2.eraser橡皮；橡皮擦；黑板擦The eraser is white.这块橡皮是白色的。
七年级英语上册 Unit 3 Is this your pencil Section B(2a-2c)教案 (新版)人教新目标版
Unit 3 Is this your pencil?阅读课 Section B(2a -2e)Learning Goals: 【知识与能力目标】1. Function: Review the topic “identify ownership ”.2. Words & Expressions: 能够正确使用下列词汇及常用表达：in, library, ask (ask …for …), find (found), some, classroom, e-mail, at, call, lost, must ; Learn anduse “Is this/that …? Are these/those … ” to ask for the owners.【学习策略】:阅读策略1. Bottom-down reading strategy : First, understand the passage as a whole, and then search for the key words.2. Guide students to play the game by practicing sentences in order to improve the ability of writing a “Lost and Found ” notice. 【情感价值目标】Culture: Encourage students to learn to return to the owner what one has picked up. 设计意图：明确本节课需要掌握的知识，能力，情感目标，以及相关学习策略；提倡学生们养成拾金不昧的精神。
Teaching and learning steps: Step1: Pre-reading activitiesTask 1: Review: Role-play the conversationsT: we have learned how to introduce and indentify things, so can you work in pairs to have these two conversations? Have a try! Pay attention to your pronunciation.Conversation 1 A : What’s this? B: It’s a watch. A: How do you spell it?B: W-A-T-C-H.A: Is this your watch? B : Yes, it is.Conversation 2 A: What’s this? B: It’s a ring.A: How do you spell it?B: R-I-N-G.A: Is this your ring? B: No, it isn ’t.设计意图：可选取教室内的物品，诱发学生思考如何就物主关系进行问答，再温习旧知识的同时为本节课阅读内容做铺垫。