八年级英语教学反思-八年级英语下册When 和 while 的用法与区别的教学反思

八年级英语教学反思-八年级英语When 和 while 的用法与区别的教学反思 精品资源～临风文档。 八年级英语教学反思-八年级英语下册When 和 while 的用法与区别的教学反思 八年级下册Unit3 What were you doing when the UFO arrived? When 和 while 的用法与区别的教学反思 when示“当……的时候”。从句中既可用延续性动词～ 又可用非延续性动词～这些动词既可以表示动作～又可表示 状态。从句中的动作既可和主句的动作同时发生～又可在主 句的动作之前或之后发生。如:I was doing my homework when he came in. while表示“在……的时候”、“在……期间”。它强调主 句的动作与从句的动作同时发生或主句的动作发生在从句的 动作过程中。while从句中必须是表示动作或状态的延续性动 词。 如果主句的动作在从句的动作过程中发生～从句常用进 行时。如: The weather was fine while they were in the country. I called the TV station while the alien was in the museum. 1 While I was watching TV in the living room, my mother was cooking in the kitchen. 何为延续性动词和非延续性动词:延续性动词指动作可 以延续一段时间～而不是瞬间结束～如:look、study、keep、 eat等,非延续性动词指动作极为短暂～瞬间结束～如:start、 begin、come、arrive、等。 2