2014九年级Unit-9_when_was_it_invented课件Section_A_4a-4c

1、Unit 9When was it invented?Period 5 Section A 4a-4cReview vWhen was invented ?vIt was invented invWhat is it used for ?vIt is used for最糟糕的发明最糟糕的发明v “二十世纪最糟糕的发明是什么二十世纪最糟糕的发明是什么 ? ”就是人们每就是人们每天大量使用的塑料袋。天大量使用的塑料袋。 诞生于上个世纪三十年代诞生于上个世纪三十年代的塑料袋，其家族包括用塑料制成的快餐饭盒、的塑料袋，其家族包括用塑料制成的快餐饭盒、包装纸、餐用杯盘、饮料瓶、酸奶杯、雪糕杯等包装纸、餐

2、用杯盘、饮料瓶、酸奶杯、雪糕杯等等。这些废弃物形成的垃圾，数量多、体积大、等。这些废弃物形成的垃圾，数量多、体积大、重量轻、不降解，给治理工作带来很多技术难题重量轻、不降解，给治理工作带来很多技术难题和社会问题。和社会问题。 比如，散落在田间、路边及草丛中比如，散落在田间、路边及草丛中的塑料餐盒，一旦被牲畜吞食，就会危及健康甚的塑料餐盒，一旦被牲畜吞食，就会危及健康甚至导致死亡。填埋废弃塑料袋、塑料餐盒的土地，至导致死亡。填埋废弃塑料袋、塑料餐盒的土地，不能生长庄稼和树木，造成土地板结，而焚烧处不能生长庄稼和树木，造成土地板结，而焚烧处理这些塑料垃圾，则会释放出多种化学有毒气体，理这些塑料垃圾

3、，则会释放出多种化学有毒气体，其中一种称为二噁英的化合物，毒性极大。其中一种称为二噁英的化合物，毒性极大。fridge /frid/ n. 冰箱冰箱vI think a fridge is the most useful invention in modern world. translate /trnsleit/ v. 翻译翻译vShe is translating the words intovEnglish.vShe is a good translator.lock /lk/, /la:k/ v. 锁上；锁住锁上；锁住vHe is locking the car.vThese lock

4、s are strong.earthquake / :(r)kweik/n. 地震地震vDont be afraid of the earthquake.biscuit /biskit/ n. 饼干饼干vDont eat too much biscuit, it isnt good for your health.cookie/kuki/ n. 曲奇饼干曲奇饼干vDont eat so much cookie, because it is too sweet.instrument /instrumnt/ n. 器械；器械； 仪器；工具仪器；工具vThere are many kinds of

5、instruments in our school.New wordsvfridge /frid/ vn. 冰箱冰箱vtranslate /trnsleit/ vv. 翻译翻译vlock /lk/, /la:k/ vv. 锁上；锁住锁上；锁住 vearthquake / :(r)kweik/vn. 地震地震vsudden /sdn/ vadj. 突然（的）突然（的）vall of a sudden v突然突然; 猛地猛地 vbiscuit /biskit/ vn. 饼干饼干 vcookie/kuki/ vn. 曲奇饼干曲奇饼干 vinstrument /instrumnt/ vn. 器械；器械

6、； 仪器；工具仪器；工具根据汉语提示完成单词。根据汉语提示完成单词。 1. The boy lost his parents during the last years (地地震震).v2. The students were asked vto (翻译翻译) the story into English.v3. The police found the lost boy under the destroyed house through an (仪器仪器)。earthquaketranslateinstrumentv4. I only have some (饼干饼干) and a glass

7、 of milk every morning.v5. If you cant eat all these fruit , you may put some into your (冰箱冰箱). biscuits fridgeWhen was the zipper invented?It was invented in 1893.Who was it invented by?It was invented by Whit comb Judson.When was tea brought to Korea?It was brought to Korea during the 6th and 7th

8、centuries.What is the hot ice-cream scoop used for?Its used for serving really cold ice-cream. The passive voice 被动语态被动语态 语态是表示主语与谓语的关系的。如果语态是表示主语与谓语的关系的。如果主语是动作的执行者，动词要用主动语态；主语是动作的执行者，动词要用主动语态；反之，如果主语是动作的承受者，动词就反之，如果主语是动作的承受者，动词就要使用被动语态。要使用被动语态。 被动语态谓语部分结构为助动词被动语态谓语部分结构为助动词be + 过去分词过去分词。 一般过去时态的被动一

9、般过去时态的被动形式形式注意：注意：这里这里 be 的形式决定了被动语态的的形式决定了被动语态的时态，其后的过去分词没有变化。时态，其后的过去分词没有变化。肯定句肯定句 主语主语 + waswere + 过去分词过去分词 + (by )否定句否定句 主语主语+ waswere not +过去分词过去分词 +(by )一般疑问句一般疑问句 waswere +主语主语+过去分词过去分词 + (by )?特殊疑问句特殊疑问句 疑问词疑问词 + waswere +主语主语 + 过去分词过去分词 + (by )?时态时态肯定形式肯定形式 否定形式否定形式疑问形式疑问形式一般一般过去过去时时S +was/

10、were+doneS +was/were+not + doneWas /Were+S + done?Maria bought the book last year. (主动句主动句)The book was bought by Maria last year. When was the book bought by Maria?What was bought by Maria last year?被动句：被动句：让我们看一看各种句型的主动语态变为被让我们看一看各种句型的主动语态变为被动语态时，到底发生了什么变化？动语态时，到底发生了什么变化？把下列句子改为被动语态。把下列句子改为被动语态。1.

11、 They made these computers in Shenzhen. These computers _ _ in Shenzhen.2. She bought a new bike yesterday. A new bike _ _ by her yesterday.were madewas bought1. I feel very happy that I _ to be the host. Congratulations! (07 江西江西) A. choose B. am chosen C. was chosen D. haven chosen 2. Today Chines

12、e _ by more and more people around the world. (07北京北京) A. was spoken B. is spoken C. spoke D. speak 3(课改实验区考生做课改实验区考生做) (07重庆重庆) Your hometown has changed a lot Yes. Take a look at these tall buildings. They _ last year A. build Bbuilt C. was built Dwere built (非课改实验区考生做非课改实验区考生做) Why is the classro

13、om so dirty? Sorry, sir. It _ yesterday We forgot to do it A. dont clean B. didnt clean C. werent cleaned D. wasnt cleaned再次阅读翻译语法句子vWhen was the zipper invented?vWho was it invented by?vWhen was tea brought to Korea? What is the hot ice-cream scoop used for?vIt was invented in 1893.vIt was invented

14、 by Whitcomb Judson. It was brought to Korea during the 6th and 7th centuries.vIts used for serving really cold ice-cream. 4a Rewrite the sentences using the passive voice. v1. They sold the fridge at a low price. vThe fridge was sold at a low price. v2. Somebody stole my camera from my hotel room.

15、v3. Where did you take these photos? My camera was stolen by somebody from my hotel room.Where were these photos taken by you ?v4. Our parents advised us not to go out alone. 5. Different writers translated the book into different languages. We were advised not to go out alone by our parents.The boo

16、k was translated into different languages by different writers.4b Complete the sentences with the correct forms of the verbs in the box. v1. You to the party last night, werent you? Why didnt you go?v2. The earthquake all vof a sudden, but luckily the villagers to a safe place.were invited came were

17、 brought v3. The door when we arrived, so we the bell.v4. The students not to eat or drink in class. But vRuby the rule vwhen she started eating a biscuit in science class. 5. The cookies by the hungry kids in less than 20 minutes. Then they for more!was locked rang were told broke were eatenasked 4

18、c Decide whether active or passive forms should be used in these sentences. Write the correct forms in the blanks vThe telephone (invent) by Alexander Graham Bell. He (born) in 1847. Alexander (work) on the invention of the telephone with Thomas Watson. In 1875, Alexander (learn) to send musical notes through an instrument similar to a telephone. was invented was born worked learned learntvFinally, the telephonev(invent) in 1876. The first sentence that (say)von the telephone by Alexander was “Mr. Watson, come here; I want to see you.” Today the telephone (use) ar