【弯道超车】Unit 7 The secret of memory 核心语法之现在完成时-2025年沪教版（2024）新八年级英语上册精讲精练 (含答案解析)

/ 让学习更有效 新课备课备考 | 英语学科 / 让学习更有效 新课备课备考 | 英语学科 2025年沪教版（2024）新八年级英语上册精讲精练 Unit 7 The secret of memory 核心语法：现在完成时 一、核心概念 现在完成时 表示动作在过去发生，但与现在有联系，强调对现在的影响或结果。 结构：have/has + 过去分词 二、基本用法 用法 说明 时间状语 例句 已完成 动作已完成，强调对现在的影响 already, just, yet I have finished my homework. 未完成 动作从过去持续到现在 for, since, so far She has lived here for 10 years. 经历 过去有过某种经历 ever, never, once Have you ever been to Beijing 三、句型结构 句型 结构 例句 肯定句 主语 + have/has + 过去分词 He has seen the movie. 否定句 主语 + have/has not + 过去分词 I haven't finished yet. 疑问句 Have/Has + 主语 + 过去分词 Have you eaten lunch 过去分词变化规则： 规则动词：+ed (work → worked) 不规则动词：特殊变化 (go → gone, see → seen) 四、时间状语 1、不确定时间： already（已经） just（刚刚） yet（还，仍） ever（曾经） never（从不） 2、一段时间： for + 时间段 (for two years) since + 时间点 (since 2020) so far（到目前为止） recently（最近） 五、易错点分析 1、与一般过去时混淆 I have seen him yesterday.（错误） I saw him yesterday.（正确） 2、for 与 since 误用 I have lived here since three years.（错误） I have lived here for three years.（正确） 3、延续性动词误用 His father has died for two years.（错误） His father died two years ago.（正确） 六、记忆口诀 “现在完成时，have/has加过分。 过去动作影响现，持续经历都能表。 for since时间状，already just yet伴。 延续动词要用对，过去时间不能连。” 1．Alex’s grandfather _____ tea culture for ten years. A．studies B．studied C．has studied D．was studying 2．Linda a lot since I saw her last time A．has changed B．willchange C．is changing D．changed 3．—How long _____ since you _____ to study English —For about three years. A．was it, began B．is it, begin C．has it been, began 4．Great changes _____ in my hometown in the past five years. A．take place B．took place C．have taken place 5．--Shall we go to Spring Bay together --No, thanks. I have already there. A．gone B．gone to C．been D．been to 6．Ben is a foreign teacher.So far,he in Shiyan for five years． A．was teaching B．has taught C．will teach D．taught 7．Last week I _____ a cold. My sister also _____ a cold since last week. A．have had; has had B．caught; has had C．have had; has caught D．caught; has caught 8．— Where is Mike — He _____to New York on business. He _____ the airport at five in the morning . A．has gone; has left for B．has been; has left for C．has gone; left for D．has been; left for 9．In the past two years, the bad living environment they were used to a lot. They have bigger and brighter houses. A．improving B．improve C．has improved D．improved 10．We have _____ the game _____ the computer． A．taken；off B．take；off C．copy；onto D．copy；to 11．Lily says she _____ the book for ten days and she has to return it to the library today. A．has borrowed B．borrowed C．has kept D．is going to borrow 12．–Have you____ ... ...