Unit 10I’ve had this bike for three years.语法课Learning aims:现在完成时区分for 与since的用法掌握短暂性动词与延续性动词之间的转换回顾就知 （学案）探究新知现在完成时一：过去动作对现在造成的影响。 I know the film. I have seen it before.现在完成时二：过去已经开始，持续到现在的动作或状态，也可以表示实质可能继续下去的动作或状态。通和 for（一时间）, since（时间点） 引导的时间状语 连用。此外还可以与 so far（到目前为止）, in the last ten years（在过去的十年里）, by now, these days等连用。 例句：I have learnt English for more than ten years.我已经学了10多年的英语。(从10年前开始,持续到现在还在学)例句：She has swum since half an hour ago.我已经游泳了半个小时(半个小时前已经开始游泳,到现在还在游) 知识点一 for和since的运用 for “经历(时间)” since “自从…?以来” for＋时间 since＋时间 ＋ago since＋时间点 since＋从句1.He?has?stayed?here?for? 3?hours. 2.He?has?stayed?here?since?3?hours?ago. 3.He?has?stayed?here?since?3?o’clock. 4.He?has?taught?English?since?he?came?here.练一练：用for和since填空。______three hours______three o’clock______two days______yesterday afternoon______I came here______last Sunday_______a week_______a long time_______1997 ______two weeks_______three years ago _______ last monthforsinceforsincesincesinceforforsinceforsincesince注意:since的特殊用法It is two years since m |
