Unit4语法专项课件-现在完成时2026-2027学年沪教英语（五四学制）七年级上册

该初中英语课件系统梳理了现在完成时的核心知识，涵盖四种基础句型、动词过去分词规则与不规则变化、两大用法及对应标志词，通过“定义-结构-用法-对比-易错点”的逻辑脉络串联知识点，帮助学生构建完整的语法知识网络。 其亮点在于采用“全解精讲+分层练习”策略，设计动词适当形式填空、for/since选词、句型转换等多样化练习，如时态改写题将一般过去时转换为现在完成时，培养学生的语言能力和思维品质。易错点汇总助力精准纠错，分层设计满足个性化需求，教师可高效开展复习教学，提升学生知识巩固效果。

教学课件 沪教英语（五四学制）七年级上册 Unit4 语法专项 ——现在完成时 全解精讲+分层练习 1 1.牢记现在完成时四种基础句型结构 2.分清动词过去分词规则、不规则变化 3.掌握两种核心用法及对应时间标志词 4.区分现在完成时与一般过去时差异 学习目标 什么是现在完成时 时态名称：Present perfect tense 两层核心含义： 1.过去动作，对当下产生结果 / 影响 2.动作从过去持续至今，可能延续 不强调动作发生的具体过去时间 现在完成时基础总结构 通用公式：主语 + have/has + 过去分词 主语区分规则： I/You/We/ 复数名词 → have He/She/It/ 单数名词 → has 简写：have not=haven’t；has not=hasn’t 句型 1 肯定句书写格式 结构：主语 + have/has + done 例句 1：I have finished my homework. 例句 2：She has visited the science museum. 提示：done 代表动词过去分词 句型 2 否定句书写格式 结构：主语 + haven’t/hasn’t + done 例句 1：We haven’t watched the new film. 例句 2：He hasn’t bought the smart watch yet. 注意：否定句常用标志词 yet 放句末 句型 3 一般疑问句及回答 疑问结构：Have/Has + 主语 + done？ 肯定答：Yes, 主语 + have/has. 否定答：No, 主语 + haven’t/hasn’t. 例：—Have you read this book? —Yes, I have. 过去分词规则变化（一） 1.动词直接加 - ed：work→worked 2.不发音 e 结尾加 - d：live→lived 3.辅 + y 结尾，变 y 为 i 加 - ed：study→studied 4.重读闭音节双写尾字母加 - ed：stop→stopped 单元高频不规则过去分词 be — been have — had see — seen go — gone make — made break — broken buy — bought learn — learnt/learned 需背诵，时态填空必考 用法一：过去动作影响现在 核心特点：只看当下结果，不问动作时间 常用标志词：already、just、ever、never、yet 场景举例：钥匙丢了→现在进不去家门 标志词 already & just 用法 already：已经，放 have/has 与 done 中间，只用肯定句 例：They have already cleaned the classroom. just：刚刚，位置同 already，表动作刚结束 例：I have just met my old friend. 标志词 ever & never 用法 ever：曾经，用于疑问句中间 例：Have you ever travelled by plane? never：从不，表否定，放句中 例：He has never visited big cities. 标志词 yet 使用规则 yet 译为还、尚，固定放句子末尾 仅用于否定句、一般疑问句 否定句：I haven’t finished lunch yet. 疑问句：Has she arrived yet? 用法二：动作持续到现在 动作始于过去，延续至当下，可继续持续 标志词：for、since、so far 提问持续时长统一用：How long for 与 since 用法区分 for + 时间段：for three days、for a year since + 时间点 / 过去句子：since 2020 since + 从句：since I was ten 例：I have lived here for 6 years. 标志词 so far 讲解 so far：到目前为止，句首或句末 是现在完成时标志性短语 例：So far, we have learned 3 units. 提示：出现该短语优先用现在完成时 短暂性动词与延续性动词 for/since 表长时间，不能用短暂动词 buy（买）→延续 have；leave→be away 例：I have had the bike for 2 years. 错误：I have bought the bike for 2 years. have been to & have gone to have been to：去过某地，现已返回 have gone to：去了某地，目前不在现场 例 1：I have been to Beijing twice. 例 2：Mum has gone to the supermarket. 现在完成时 vs 一般过去时 时态 核心侧重 时间词 现完 关联现在，结果 / 经历 already,for,since 一过 过去单一动作，与现在无关 yesterday,last week 时态对比例句一组 1.I have seen this movie.（看过，了解剧情） 2.I saw this movie last Sunday.（上周看的，仅陈述过去） 关键：有无明确过去时间词 易错点汇总 1（结构类） 1.漏写 have/has，直接加 done 错：I finished my homework already. 2.主语三单误用 have 错：She have gone to school. 3.忘记动词变过去分词 易错点汇总 2（标志词类） 1.肯定句末尾误用 yet 2.already 出现在否定 / 疑问句 3.for 后接年份、since 后接时间段 4.How long 问句使用短暂动词 题型一 动词适当形式填空 1.He_________________(read) this novel twice. 2.We_________________(not visit) the museum yet. 3._________you_________(eat) western food? 4.They_________________(live) here since 2022. 5. My sister_________________(buy) a new bag for 1 month. 6. So far, we_________________(learn) many new words. has read haven’t visited Have eaten have lived has had have learned 题型二 for /since 选词填空 选用 for 或 since 填入横线 1.I have waited_________half an hour. 2.She has danced_________she was six. 3.They have stayed in town_________last Monday. for since since 题型三 单项选择 1.—_________ you_________your task yet? A. Did; finish B. Have; finished C. Do; finish D. Will; finish 2.My dad_________to Paris three times. A. went B. has been C. has gone 3. How long_________you_________this pen? A. have; buy B. did; buy C. have; had 4. He isn’t here. He_________the library. A. has been to B. has gone to C. goes B B C B 题型四 句型转换 1.I have already cleaned my desk.（变否定） I__________________ my desk _________. 2.She has lived here for 3 years.（一般疑问） _________ she_________here for 3 years? 3 .They have learnt English since 2019.（划线 since2019） __________________have they learnt English? 4.I have seen this film.（划线 seen this film） __________________you _________? haven’t cleaned yet Has lived How long What have done 题型五 时态改写（一过改现完） 1.I bought this watch last month. 改写：I__________________ this watch for a month. 2.She visited the farm last year. 改写：She__________________ the farm once. 题型六 改错练习（圈出错处改正） 1.I have see that cartoon before. 2.He has leave Shanghai for two weeks. 3.Have you ever go to the seaside? have had has visited see → seen leave → been away go → gone ever 本节课核心总结 1.结构：have/has + 动词过去分词 2.两大用法：影响现在、持续到现在 3.分清标志词、for/since、延续动词转换 4.区分 have been to /have gone to 5.现完侧重现在，一般过去时只讲过去 教学课件 Unit4 语法专项 ——现在完成时 Thank you for listening! 29 $