U4T2SectionB课件.ppt

Section BLearning aims1. Learn the simple passive voice2. Learn about some inventions3. The usage of “be used for doing”The river is polluted by human beings.The trees are cut down by farmers.The structure of simple present passive voice:by+sbin+ placeThe structure of simple past passive voice: by+sb be(was/were)+p.p+ in+place be(is/am/are)+p.p+Light bulbWhen was it invented?It was invented in 1879.Who invented it?It was invented by Thomas EdisonAirconditioning 1902 Willis. KallyIt was invented by Willis.Kally in 1902.Ship / 1807/ FultonIt was invented by Fulton in 1807. Airplane 1903 Wilbur and Orville Wright It was invented by Wilbur and Orville Wright in1903.Some questions1. When was the light bulb invented?It was invented in 18792. Who invented it?It was invented by Thomas Edison3. How many inventions did he make?More than one thousandWork alone Read 1a again and fill out the forminventioninventoryear light bulbGuglielmo Marconi19031879Thomas Edisonradio1895airplaneWilbur and OrvilleWrightIt’s time for us to ask or answer the places that we may don’t know.1.I can fly fast. I can send satellites or spaceships into space .2.2. You can use me to talk to you friends, who are far away from you, but you must pay some money, and also I can’t move.3. I am seen in each family, I can make people relaxed by providing different programs. I can’t work without electricity. Some children like me very much.4. I have four wheels, and I can run quickly. Though you see me in the streets, I am too expensive to afford. 5. I am useful. People can read books,write letters,do some shopping, play games,even make “unreal”friends on me .Some students fall behind in their studies because of me. rockettelephonetelevisioncarGuess who am I computerWork aloneListen to the tape, choose the correct answers and fill in the blanks. Inventor Year A. Karl Benz a. 1926B. John Baird b. 1876C. Alexander Graham Bell c. 18853a Read and understand. Cloning Do you know Dolly, the cloned sheep? She was created in Scotland a few years ago. Cloning is an experiment that is famous throughout the world. So far, scientists have cloned rabbits, sheep, cows ,mice, pigs and some other animals. But what is used in cloning? It’s DNA. As you know, there is DNA in most living things, including human beings. DNA is the same in every part of your body. For example, your fingernails have the same DNA as your hair. You have your own DNA, but it is similar to your parents’. However, Dolly’s DNA is exactly the same as the sheep she was cloned from. I want to clone pandas. What do you want to clone? 3b Work alone( ) 1. The cloned sheep, Dolly, was cloned in Canada. ( ) 2. Scientists have cloned pigs. ( ) 3. Every part of our body has different DNA. ( ) 4. There is DNA in all living things.FTFF根据根据3a，将下列几项内容排序。

将下列几项内容排序A the cloned sheep, DollyB the introduction of DNAC other cloned animalsD some examples of DNA1—4 _____________ A C B DExercises for you.1.A knife __________(被用来)cutting things.2.A stamp__________(被用来)post a letter.3.The ship and the washer____________(被发明) in the 19th century. They are great___________(发明)in the world.4.Thomas Edison was one of the most famous__________(发明家)all over the world.5.A______________(数码相机)is used to take photos of people. is used foris used towere inventedinventionsinventorsdigital cameraMore inventions in our daily lifeSpecial bookmarkIt can be fixed(固定) in your books, looks like a ruler, and tells you which line you have read exactly. It is helpful. High-heeled shoesThey are adjustable(可调节). They will become low in 3 minutes. This kind of shoes are welcomed by women.Child chairIt can be folded with three safety belts,It can also be used as a bed when babies want to sleep. It is comfortable.Magical socks The holes on the top of socks can join together. They are easy to wash. In summer, they can make your feet cool while warm in winter. And they can keep the smell away. Do you want to invent anything?Discuss with your partner, tell me What is it?What does it look like?What is it used for?Who is the little inventor? 。