1、Unit 4 Amazing ScienceTopic 1 When was it invented?Section A 课件课件 2Review 1）Kangkang,could you give us some advice on how _(learn)English well?2）How _(improve)it was my biggest problem.3）My difficulty in learning English is how _(get)the pronunciation right.4）I dont know when _(start)tomorrow.5）They
2、 may know what _(do)next.to learnto improveto getto startto doWhat are the Four Great Inventions in ancient China?Do you know?Chinese four great ancient inventionscompassgunpowderprintingPaper makingTalk about the inventions(发明发明).Which one do you think is the most helpful invention in our daily lif
3、e?carTVmobile phonecameraclockWho was tea invented by?It was invented by the Chinese ruler called Shen Nong Shen Nong How was it invented?boiling water over an open fire fell into and remainedproduced a nice smell tasted the brown water tea It was invented by accident.potato chips1850 18701853When w
4、as it invented?根据句意和所给汉语提示根据句意和所给汉语提示,完成下列单词的完成下列单词的确拼写。确拼写。1.Thats the most _(有用的有用的)book.2.It is said that Thomas Edison had 1,093_(发明发明)during his lifetime.3.-What is this kind of machine used for?-Its used for _(听听)to music.4.If you _(加热加热)the ice,it will soon become water.5.Children also need t
5、ime _(玩耍玩耍).useful inventions listening heat to play Complete the sentences with the correct forms of the verbs in the box.1.One of the worlds favorite drinks was_ by accident.2.Tea was first _ by Shen Nong 5,000 years ago.3.A nice smell was _ when the tea leaves dropped into the hot water.4.Tea was
6、_ to Korea and Japan during the 6th and 7th centuries.5.Tea is now _ between many different countries.invent,drink,bring,produce,tradeinventeddrunkproducedbroughttraded 一般过去时态的被动语态一般过去时态的被动语态结构结构:was/were+V过去分词过去分词 一般过去时态的被动语态结构一般过去时态的被动语态结构注意：这里注意：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
7、分词没有变化。肯定句肯定句 主语主语+was/were+V过去分词过去分词+(by)否定句否定句 主语主语+was/were+not+V过去分词过去分词+(by)一般疑问句一般疑问句 Was/Were +主语主语+V过去分词过去分词+(by)?特殊疑问句特殊疑问句 特殊疑问词特殊疑问词+was/were+主语主语+V过去分词过去分词+(by)?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 bough
8、t 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？1.I feel very happy that I _ to be the host.Congratulations!A.choose B.am chosen C.was chosen D.haven chosen 2.Today Chinese _ by more and more people around the world.A.was spoken B.is spoken C.spoke D.sp
9、eak 3.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 4.Why is the classroom so dirty?Sorry,sir.It _ yesterday We forgot to do it A.dont clean B.didnt clean C.werent cleaned D.wasnt cleaned5.(2012辽宁大连辽宁大连)-Thank you for
10、taking me around your school.-_ A.Dont mention it.B.Never mind.C.Of course not.D.No problem.6.-Sorry,Sir.I made a mistake again.-_.Practice more and you will do better.A.Never mind B.Im not sure C.Youre welcome D.Dont mention itAA Rewrite the sentences using the passive voice.1.They sold the fridge
11、at a low price.The fridge was sold at a low price.v2.Somebody stole my camera from my hotel room.v3.Where did you take these photos?My camera was stolen from my hotel room by somebody.Where were these photos taken?v4.Our parents advised us not to go out alone.We were advised not to go out alone by o
12、ur parents.5.Different writers translated the book into different languages.The book was translated into different languages by different writers.用所给动词的正确形式填空：用所给动词的正确形式填空：1.The bike _(fix)up by Xiaoming yesterday.2.Shields _(use)for protecting peoples body in the past.3.Last year,a picture _(put)up on the blackboard.4.She said French_(speak)in France.5.Teenagers _(allow)to choose their own clothes two years ago.was fixedwere usedwas putwas spokenwere allowed
