Unit 9 When was it invented英語教案

　　學習目標：

　　學習一般過去時的被動語態(tài)和特殊疑問句。

　　教學重難點：

　　一般過去時態(tài)的被動語態(tài)

　　基本結(jié)構(gòu)：助動詞be（was / were）+及物動詞的過去分詞

　　A thief was caught last night.

　　They were asked to speak at the meeting.

　　肯定式：It was made.

　　否定式：It was not made.

　　疑問式：Was it made? No, it wasn’t Yes, it was

　　學習過程：

　　1. 情境導入：warm-up

　　Ask the students to be familiar with the words below according to the pictures on computer.

　　Telephone, calculator, car, personal computer, TV, electric light, light bulb, alarm, clock, microwave oven, electric slipper.

　　2. 自主學習：presentation

　　1) 教學When was the car invented? It was invented in……

　　Choose the three inventions of these and ask students to guess when each one was invented.

　　For example, you might choose car, telephone, and personal computer.

　　Have several different students guess and write the dates on the board. Ask the class to repeat the questions and answers.

　　[T=Teacher, S=Student]

　　T: When was the car invented ? (Class repeat.)

　　T: Good. Now Jackie, what was your guess?

　　S1: 1900

　　T: OK. Jackie, repeat after me. The car was invented in 1900.

　　Repeat the process with several different inventions.

　　At last, make students find out the real dates.

　　2) 教學Who were the light bulbs invented by? And what are they used for ?

　　呈現(xiàn)Edison and light bulbs的畫面。

　　Tell the students Edison invented light bulbs.

　　Then ask the students to answer the questions below.

　　T: Who were light bulbs invented by? ( Class repeat )

　　T: Good. Now Class repeat after me. They were invented by Edison.

　　合作探究

　　1)教學 操練1a, 1c, 2c

　　學生看書本上1a的圖畫，根據(jù)圖畫，把1a, 1c, 2c中的語言點綜合起來，叫學生相互間回答問題。并用剛剛學到的目標句型來操練。最后，抽查幾對學生，讓他們在全班面前，按要求進行對話。

　　2)教學1b, 2a, 2b

　　首先，幫助學生明確本題的要求。接著，聽力練習，學生根據(jù)錄音內(nèi)容完成1b, 2a and 2b.

　　最后，重放一遍錄音內(nèi)容，學生跟讀。

　　拓展創(chuàng)新

　　Consolidation and Extension.

　　完成一個任務(wù)

　　Ask some students to read about an invention using an encyclopedia or other book from the library, or by looking up information on the Internet. Have the students write up a short reportand draw a simple picture of the invention or bring in a photo of it. Ask each students to show the picture and read his or her report to the class.

　　達標測試

　�。ㄒ唬└鶕�(jù)時間和人物寫出發(fā)明物。

　　1) 1885____________ 2) 1876 ________________ 3) 1927____________

　　4) 1976 ________________5) Julie Thompson _________6) Chelsea Lanmon ______

　�。ǘ�）漢澤英

　　1)計算機是何時發(fā)明的？

　　2)誰發(fā)明了計算機？

　　3)計算機是用來做什么？

　　4)你認為什么是最有用的發(fā)明？

　　5)它能夠給人們更多時間工作和玩。

　　典型例題解析

　　1.--What a nice classroom! --It ____ every day.

　　A. is cleaning B. has cleaned C. must clean D. is cleaned

　　解析：推測這句話的意思應(yīng)該是“它每天都被打掃”，考查被動語態(tài)的結(jié)構(gòu)be + 動詞的過去分詞。因此答案應(yīng)該選D。

　　2.I know Beijing well. I ____ there three times.

　　A .will go B. have been C. went D. have gone

　　解析：推測這句話的.意思“我很了解北京，我去過那三次”。表示去過應(yīng)該采用的時態(tài)是現(xiàn)在完成時，因此可排除A和C，區(qū)別have been和have gone,have been 去過；have gone 去了（還沒回來）。因此應(yīng)該選擇B。

　　中考連接

　　1.--Look at the sign on the right. --Oh, smoking ____ here.

　　A .doesn’t allow B. isn’t allowed C. didn’t allow D. wasn’t allowed

　　2. --Will you come to the dinner party? --I won’t come unless Jim ______.

　　A. can’t be invited B. was invited C. will be invited D.is invited

　　課后反思

　　說一說這節(jié)課你學到了什么知識？

　　Unit 9 When was it invented?

　　Section B

　　教師寄語：Virtue never grows old. 美德永不老。

　　學習目標

　　1、熟練掌握被動語態(tài)用法。

　　2、學會用被動語態(tài)表達對創(chuàng)造和發(fā)明事物的認識和看法。

　　教學重難點：主動語態(tài)被動語態(tài)

　　1．主動結(jié)構(gòu)的賓語變?yōu)楸粍咏Y(jié)構(gòu)的主語；

　　2．主動結(jié)構(gòu)的謂語動詞由主動語態(tài)變?yōu)楸粍诱Z態(tài)；

　　3．主動結(jié)構(gòu)的主語變?yōu)榻樵~by的賓語，組成介詞短語，放在被動結(jié)構(gòu)中謂語動詞之后。在動作的執(zhí)行者無須說明或不必強調(diào)時，by短語可以省略。

　　4．主動語態(tài)、被動語態(tài)兩種時態(tài)要保持一致：

　　We repaired the motor.

　　The motor was repaired by us.

　　教學過程：

　　1.情境導入： Warm – up:

　　Ask the students to practice speaking.

　　A: When was …… invented ?

　　B: It was invented in ……

　　A: Who was it invented by ?

　　B: It was invented by ……

　　A: What is it used for ?

　　B: It is used for ……

　　2. 自主學習：Presentation.

　　1) 教學helpful, annoying

　　Ask students to give some examples to show what each word means. For example.

　　A vacuum cleaner is helpful. A very loud truck is annoying.

　　2) 教學3a

　　呈現(xiàn)alarm clock, light bulb, microwave over, tea, and so on的畫面。Then ask the students the following questions.

　　T: Is the light bulb useful or annoying ? ( Opinions may differ. )

　　S1: I think it’s useful.

　　T: Why is it ?

　　S1: Well, it gives people more time to work and play every day.

　　Then ask the students to make a list of five helpful inventions and five annoying inventions on their own. Give the class about five minutes to do this.

　　3．合作探究： 教學 操練3b

　　Ask the students to work in pair the following talk using the target language.

　　A: What do you think is the most helpful / annoying invention?

　　B: I think the most helpful / annoying invention is ……

　　A: Why is that ?

　　B: Well, it gives people……

　　4. 拓展創(chuàng)新：Consolidation and Extension

　　Imagine that you are alone on a tiny island, Choose five inventions you would like to have on the island with you. Tell the group what you chose and why.

　　5. 梳理歸納：

　　本節(jié)課主要的內(nèi)容是主動與被動語態(tài)的練習轉(zhuǎn)換。

　　6.達標測試：

　　句型轉(zhuǎn)換

　　1. She was seen to come out of the library by him.（變被動語態(tài)）

　　2. When are trees often planted?（變被動語態(tài)）

　　3. The League was founded in Guangzhou in 1922（就畫線部分提問）

　　4. Did the students wear the school clothes a lot ?（變被動語態(tài)）

　　5. Kate took god care of the baby yesterday evening.（變被動語態(tài)）

　　6.His aunt bought him a bicycle.（變被動語態(tài)）

　　7.His aunt bought him a bicycle.（變被動語態(tài)）

　　典型例題解析

　　1.老人們被照顧地很好。The old ______ ______ after well.

　　解析： 這個題主要考查被動語態(tài)的結(jié)構(gòu)be + 動詞的過去分詞和應(yīng)用，在本題中應(yīng)該是be looked after.

　　2.You can use the box ______ the toys.

　　A. carry B. carrying C. to carry D. carried

　　解析：在這個題目考查一個短語的應(yīng)用 use sth to do利用某物做某事，因此答案為C。

　　中考連接：

　　1.Although Tom failed the game, _____ he said he would try again.

　　A. B. and C. but D. because

　　2. I must practice _____ English, because it’s important while talking with a foreigner.

　　A. speak B. to speak C. speaking Ｄ.speaks

　　課后反思

　　想想這節(jié)課還有哪些知識沒掌握？

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