现在完成时Present Perfect Tense 课件- 2023-2024学年人教版八年级英语下册

Present Perfect Tense 1 1、用来表示之前已经发生或完成的动作或状态，而其结果却和现在有联系: 动作或状态发生在过去,但它的影响现在还存在。强调对现在的影响。 They have left. --他们已经离开了,也就是说现在他们人不在这里 I have had my lunch. --我已经吃过午饭了,也就是说我现在不饿 definition: 现在完成时的含义 2、也可表示发生在过去，持续到现在，还可能继续发生的动作或状态。 He has learned English since 2001. --从2001年开始学的,现在还在继续学着呢。 Notes to be taken 一.结构：主语+ have/has + p.p.(过去分词） eg. I have finished the housework. Y/N 回答（affirmative/negative） Special question Passive voice time phrases 时态标志词 见讲义 functions past events, impact unfinished events, continue up till now, in the future 5 past events timeline past future present actions happened in the past发生在过去 affect the present对现在产生影响 impact, result 6 past events I have finished my homework. = I finished my homework, and there is no homework now. past present finished no homework past events I turned off the lights, and the lights aren't on now. (turn - turned - turned) I have turned off the lights. She bought an English book, and she still has it now. (buy) - bought - bought) She has bought an English book. past events wash-washed-washed eat - ate - eaten unfinished states 未完成的状态 future present timeline past actions happened in the past 发生在过去 have not yet finished到现在还没有结束 10 unfinished states eg. I have lived in Chengdu. future present past 2014 2015 2016 2017 2014 2015 2016 2017 for + a period of time since + time + time a period of time + ago + sentence 11 unfinished states for or since 1. We have known each other________ 3 years. 2. I have learned English ________ 2010. 3. Has she kept this book ________ last night? 4. Have they been away ________ a long time? 5. He has lost his arms ________ he was 10. for since since since for 12 unfinished states I have got/gotten up. I have got up since 7:00. √ × I have been up since 7:00. borrow keep get married be married be away leave be on begin buy have 13 非延续性动词和延续性动词转换 没有时间状语，非延续 OK 有时间状语，非延续 转 延续 continuation verb non-continuation verbs 类似的转换还有：fall asleep