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Mr. White was reading a newspaper while he was waiting for a bus. 懷特先生邊等車邊看報(bào)。 I am doing my homework while my mother is cooking. 我做作業(yè)的時(shí)候,我媽媽在做飯。 see sb. do sth. 強(qiáng)調(diào)“看見(jiàn)整個(gè)行動(dòng),或整個(gè)事件或行為的全過(guò)程”。 I saw them cross the road. 我看見(jiàn)他們過(guò)了馬路。 see sb. doing sth. 強(qiáng)調(diào)“看見(jiàn)行動(dòng)或事件正在進(jìn)行”。 I saw them crossing the road. 我看見(jiàn)他們正在過(guò)馬路。 2c GROUPWORK Look at the picture. Say what each person was doing when the UFO took off. Make sentences with ―when‖ and ―While‖. A: What was the girl doing when the UFO took off? B: While the girl was … C: When the UFO took off the man was … take off – took off 起飛,脫去 Grammar Focus The boy was walking down the street when the UFO landed. While the boy was walking down the street, the UFO landed. The girl was shopping when the alien got out. While the girl was shopping, the alien got out. 過(guò)去進(jìn)行時(shí)的構(gòu)成及用法: 構(gòu)成: was / were + 現(xiàn)在分詞 (其中 am,is—was。 are—were ) I was doing my homework then. 那時(shí),