牛津初中英语9B U1课件4.pptVIP

选择疑问句只能用whether Are you a boy or a girl? Could you tell me? Could you tell me whether you are a boy or a girl? 4 )We all know that Mars is a planet in the solar system. ---Here ’that Mars is a planet in the solar system’ is an object clause because it’s after the verb ‘know’. So it’s O. /// （在这句中’that Mars is a planet in the solar system’ 是宾语从句，因为它在动词后面‘know’。） 5) The journey to Mars could take only a very short time in space shuttles that travel at half the speed of light. ---Here ‘that travel at half the speed of light ‘ is not an object clause because it’s not after a verb. So it’s O./// （在这句中‘that travel at half the speed of light ‘ 不是宾语从句，因为它不在动词后面。） 6) Some scientists do not believe that the journey to Mars will be very comfortable. ---Here ‘ that the journey to Mars will be very comfortable’ is an object clause because it’s after the verb ‘ believe’. So it’s O. （在这句中‘ that the journey to Mars will be very comfortable’ 是宾语从句，因为它在动词‘ believe’ 后面。） T: Now let’s learn the Object clauses introduced by ‘ if’ or ‘whether’ . T: Daniel has learned a lot about living on Mars. But he’s still worrying about something . Look at his worries. /// 1 ) Could the plants produce enough water? /// --- Daniel is not sure if / whether the planets could produce enough water. T: 2) Are there any aliens on Mars? /// ----Daniel is not sure if / whether there are any aliens on Mars./// 3) Are animals on Mars dangerous?/// --- Daniel is not sure if / whether animals on Mars dangerous. T: Let’s do more practice together. /// T: Now let’s Join the two parts using ‘if or whether’. S… T: Let’s check the answers - 1 She asks me if/ whether he lives in that house. /// -2 I want to know if /whether you have finished your homework. T: Then can you work out the rule about ‘if/ whether ‘ clause now? S: …. T: That’s right. Tips 1 We can use ‘if’ or ‘whether’ to introduce an object clause when it expresses a ‘yes / no’ question.(我们可以用‘if’ 或 ‘wh