高中英语时间状语从句课件（共16张PPT）

Examples in our textbook 1. When he was orbiting in the capsule, he took photographs of planet earth. 2. When yang landed, Premier Wen Jiabao telephoned the Control Centre to offer his congratulations. 3. When Yang took off from Jiuquan in northwest China at 9 am yesterday, China became the …. 4. While he was travelling in space, Yang spoke to two astronauts aboard the …. 5. While she was waiting a taxi outside, she met Sam Parrish. 一、 when/while 的区别 1.when表示主从句两个动作同时发生或先后发生。而while表示主从句两个动作同时发生或强调主句的动作在从句动作进行期间发生。 (1)______ they are waiting for the New Year, they listen to music , sing songs and dance. (2)______ the boy saw his mother, he stopped crying. While When 2. when+短暂性动词或延续性动词 while+延续性动词(一般为be doing。) (1)He was doing his homework ______ I saw him. (2) Please don’t talk so loud ______others are working. 3.进行时+while+进行时 She was dancing _______ I was singing 4.从句动作和主句动作同时发生，且从句动作为延续性动词时，when，while，as都可使用 ___________she was singing, we all lost ourselves in her beautiful