英语：Unit-2-《My-Favourite-School-Subject》Lesson-16课件(1)(冀教版八年级上).ppt

Present Perfect Tense(现在完成时): 结构：助动词 have/has + p.p.(过去分词) 用法：1.表示过去发生或已经完成的某一动作对现在造 成的影响和结果。 I have finished my homework. 2.表示过去已经开始，持续到现在的动作或状态， 经常和表示从过去某一时刻延续到现在（包括 “现在”在内）的一段时间的状语连用。 She has lived in Beihai for 20 years. I have been at this school for 13 years. He has taught us since(自从) last year. She has taught us a lot. She hasn’t taught us a lot. Has she taught us a lot? Yes, she has. No, she hasn’t. I have had my lunch. I haven’t had my lunch. Have you had your lunch? Yes, I have. No, I haven’t. 现在完成时和一般过去时的区别： 现在完成时：强调现在的情况，不能和表示过去的时 间状语连用，如：yesterday, last night, three weeks ago, in 1990等，但常和already, never, ever, just, before, yet, since …等状语 连用。 一般过去时：只表示过去的动作或状态，和现在没有任 何关系，常和表示过去的时间状语连用。 I have seen the film. 我看过这部电影。 I saw the film last week. 我上星期看了这部电影。 用所给单词的适当形式填空： 1. She __________(teach) us for two years. 2. He ___________(teach) us last year. 3. They ___________(live) here in 1973. 4. She ________(see) the film eight days ago. 5. She _________(see) the film. 6. Yesterday Tom ________(go) to school by bike. 7. Mr. Li ___________ (teach) us since September. has taught taught lived saw has seen went ___________ _______ _______ ___________ ________ has taught _____________ 时态 结构 标志 一般现在 一般过去 现在进行 一般将来 现在完成 原形或三单 always, usually, often, sometimes, every day … 过去式 yesterday, last night, two weeks ago, in 1990 … be + v-ing now, Listen! …, Look! … will+动原 be going to +动原 tomorrow, next week, next year have/has+p.p. already, never, ever, for… since …, just, yet, before 时间表达法（一） 1. 整点的表达： 用“数字或基数词+o‘clock”表示 6:00 6 o’clock six o’clock 12:00 12 o’clock twelve o’clock 6:30 six thirty 7:45 seven forty-five 8: