人教版九年級英語上冊《When was it invented?》SectionA PPT課件下載(第1課時)，共54頁。
Objectives
To learn to understand and use the passive voice(past tense) be + v (ed).
To learn to listen for the details.
To learn to talk about the history of inventions.
Listen again and answer the questions.
Did grandma’s family have a car?
Yes, they had a car.
Did grandma’s family have a TV? Why?
No, they didn’t have a TV, because they couldn’t afford one.
Pair Work
Make a similar conversation with your partner using the 1b as a model.
A: When was the TV invented?
B: It was invented in 1927.
A: Who was it invented by?
B: It was invented by Baird.
T: When was the telephone invented?
S: It was invented in 1876.
T: Who was it invented by?
S: It was invented by Bell.
A: What are they used for?
B: They’re used for …
What are the shoes with lights used for?
They’re used for serving for really cold ice-cream.
What are hot ice-cream scoops used for?
They’re used for seeing in the dark.
Read the passage and answer the questions.
1. What is the subject for their school project?
Small inventions that changed the world.
2. What kind of invention does Roy think of?
The zipper.
3. Why does Roy think it is a great invention?
Because it is often used in our daily lives.
4. Who and when was the zipper invented?
Whitcomb Judson invented it in 1893.
5. When did the zipper become popular?
Around 1917.
Language Points
1.invent v. 發(fā)明
指經(jīng)過認識和實踐創(chuàng)造出前所未有的事物。
►Edison invented the light bulb.
愛迪生發(fā)明了電燈泡。
invention和inventor都是名詞， 前者意為“發(fā)明”，后者意為“發(fā)明家”。
discover, invent和find都是動詞, 它們的詞義相近, 但是有區(qū)別:
★discover意為“發(fā)現(xiàn)”, 指發(fā)現(xiàn)某種本來存在,但以前未被發(fā)現(xiàn)或未為人所知的事物或現(xiàn)象。
►The lost bike was discovered at the bus stop.
丟了的自行車發(fā)現(xiàn)在公共汽車站那兒。
►Later I discovered that he was so kind.
后來我發(fā)現(xiàn)他如此善良。
★invent 意為“發(fā)明”, 指發(fā)明以前不存在的東西。
►Do you know who invented the computer?
你知道誰發(fā)明的電腦嗎？
★find 意為“找到, 發(fā)現(xiàn)”, 指偶然發(fā)現(xiàn)或幾乎沒有困難地發(fā)現(xiàn)。
►I found some old photos in that drawer.
我在那個抽屜里發(fā)現(xiàn)了一些舊照片。
2. What are they used for? 它們是用來做什么的？
be used for sth. /doing sth.意為“被用來做某事”，表示用途或目的，后接名詞或動名詞，相當于be used to do sth.
►Clothes are used for keeping (= to keep) warm.
►Wood can be used for building (= to build) houses.
►The stick is used to write on the blackboard.
used to do sth.意為“過去常常做某事”。
►I used to smoke when I was young.
use sth. to do sth.意為“使用某物來做某事”, 其被動結(jié)構為“sth. be used to do sth.”。
►These knives are used to cut pies.
be used as 意為“被用作……，被作為……使用”。
►English is used as a foreign language in China.
be used by 意為“被……使用”。
►Rubbers are often used by students to correct mistakes.
3. — Can you help me think of an invention?
— My pleasure!
My pleasure也可說成It’s a / my pleasure.或 A pleasure，意思是“我的榮幸；愿為你效勞；這是件愉快的事”。
►— Will you please help me take the books to the classroom?
請你幫我把這些書帶到教室里去好嗎？
— My pleasure. / It's a pleasure. 愿為你效勞。
pleasure n. 愉快；高興
►I will remember this meeting with pleasure.
我會愉快地記著這次的會晤。
►It is a pleasure to work with you. 和你一起工作真是件樂事。
at (one’ s) pleasure 隨便
►You are free to come and go at your pleasure. 來去自由, 尊便。
take pleasure in 以某事為樂，喜歡做某事
with pleasure 愉快地，高興地，沒問題
4. Well, you do seem to have a point …
you do seem to have a point … 是個強調(diào)句，
用“助動詞do +謂語動詞原形”的結(jié)構。
► Do Stay for supper! 一定要留下吃晚飯！
►He did come here yesterday. 他昨天的確來這兒了。
(2) have a point 有道理
►I guess you have a point there. 我想你說的有道理。
►Strangely, both of them may have a point.
奇怪的是, 兩個人似乎都有道理。
5. ...it mentioned that the zipper was...
(1) mention表示“提到；提及”，是及物動詞，其后接名詞或代詞作賓語時，無需用任何介詞；另外注意不接雙賓語。如：
►Don’t mention this problem this evening.
今晚別提這個問題。
►Nobody mentioned the time of this meeting.
誰也沒有提到這次會議的時間。
►He never mentioned his tall friend to me.
/ He never mentioned to me that he had a tall friend.
他從未向我提及他有個女朋友。
（2）若后接動詞，要用動名詞，不能用不定式。
►Whenever I mention playing football, he says he’ s too busy.
我一提起踢足球，他就說太忙。
（3） 口語中說 Don’ t mention it. 主要用來回答感謝，有時也用來回答道歉。如：
►A：Thank you very much. 多謝你了。
B：Don’ t mention it. 不客氣。
►A：I’ m sorry to have troubled you. 對不起打擾你了。
B：Don’ t mention it. 沒關系。
Homework
1.Listen to 1b and 2b.
2.Finish off the exercises.
3.Make a conversation about some inventions.
4.Role-play the conversation.
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