九年级英语 unit 9 Section A 2 课件 人教新目标版.ppt

Unit 9When was it invented?Section A Period 2 Dialogue 2: A: What is this? Dialogue 3: A: What is this? Pairwork (4:P70) Dialogue 1: A:What’s this ? B:It is a vacuum cleaner . A:Do you think it is the most helpful invention? B:Yes I do. I think the most helpful invention is the vacuum cleaner. A: Why is that? B: Well, it can help me clean the floor Groupwork (4: P70) I think the most helpful invention is… I’d like to have a…because I could… It’s used for… I also want a…because it… 7. As the name suggests, the band has lots of energy. 正如乐队的名字所暗示的那样, 这支乐队非常具有活力。 * * Four great inventions in ancient China: Paper-making(造纸术） Compass（指南针） Printing（印刷术） Gunpowder（火药) A: When was the telephone invented? B: It was invented in 1876. A: Who was the telephone invented by? B: It was invented by Alexander Bell. A: What is it used for? B: It is used for talking on the phone telephone in 1876 Alexander Bell computer in 1976 A: When was the computer invented? B: It was invented in 1976. A: What is it used for? B: It is used for chatting online/studying/… television in 1927 A: When was the television invented? B: It was invented in 1927 A: What is it used for? B: It is used for watching exciting matches. in 1971 A:When was the calculator invented? A:What is it used for? B: It was invented in 1971 B:It is used for calcalating numbers. calculator Dialogue 1: A: What is this? B: It is an alarm clock. A: What is it used for? B: It is used for waking people up in the morning. A: Do you think it is annoying? B: Yes .Sometimes, when I want to go on sleeping. alarm clock B: It is a light bulb. A: What is it used for? B: It is used for giving light. A: Do you think it is helpful? B: Yes, I think so. Because I can see in the dark. light bulb B: It is a microwave oven. A: What is it used for? B: It is used for heating cold food and cooking meals. A: Do you think it is helpful? B: Yes, I think so. Because I can use it