英语人教版九年级上册：Unit-6-When-was-it-invented-课件1.pptVIP

一般将来时：The trees will be planted by the farmers. 现在完成时：The trees have been planted by the farmers. 含情态动词的被动语态：The trees can (must,should) be planted by the farmers. 六、被动语态的几种句型： 肯定句 主语+be+过去分词+(by…) A sweet song was sung by her on the stage. 否定句 主语+be+not+过去分词+(by…) A sweet song wasn’t sung by her on the stage. 一般疑问句 Be+主语+过去分词+(by…) Was a sweet song sung by her on the stage? 特殊疑问句 疑问词+be+主语+过去分词+(by…) Where was a sweet song sung by her? 1. The woman asked the policeman for help. 2. The old man on TV tells a story on Sunday. 3. Do they use the box as a table? 4. She sent me a collection last week. 5. The teacher doesn’t teach us math this term. 练习: 请把下列主动句变为被动句 6. Did Lily buy her sister a hat? 7. We often hear him play the violin at home. 8. The lazy boy didn’t wash clothes yesterday. 9. Students listen to the kind teacher carefully. 10.When did your father took you to the park. 3a PAIRWORK Make a list of five helpful inventions and five annoying inventions. Helpful inventions Annoying inventions example telephone 1. __________ 2. __________ 3. __________ 4. __________ 5. __________ example alarm clock 1. __________ 2. __________ 3. __________ 4. __________ 5. __________ vacuum cleaner television car computer fax machine air-conditioner truck hair dryer junk food ice cream Model 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: Sometimes, when I want to go on sleep. Model 2 A: What is this? 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 always do homework and read books in the evening by its light. Model 3 A: What is this? 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 thin