Unit2 语法专项—— 现在完成时 + 动词不定式表目的 课件2025-2026学年教科版(五四学制）英语七年级下册

该初中英语课件聚焦教科版七年级下册Unit2语法专项，核心涵盖现在完成时（结构、人称搭配、过去分词变化、用法及标志词）与动词不定式表目的（to/in order to/so as to结构、否定形式及对比）。课堂导入从基本概念切入，通过“概念-结构-用法-易错点”层层递进，结合单元话题（科技、通讯等）实例，构建从理解到应用的学习支架。 其亮点在于结构化呈现与精准化突破，如“单三has，其余have”口诀助记人称搭配，三者对比表明晰用法差异，易错点分析（如现在完成时不与过去时间连用）培养思维品质。分层练习（填空、改句、单选）提升语言运用能力，知识总结强化学习策略，既帮助学生系统掌握语法，也为教师提供高效教学资源。

教学课件 教科版英语七年级下册 Unit2 语法专项—— 现在完成时 + 动词不定式表目的 全解精讲+分层练习 1 学习目标 1.掌握现在完成时的含义、结构与用法 2.掌握 have/has 与人称的搭配规则 3.掌握动词过去分词的规则与不规则变化 4.掌握 to / in order to / so as to 表目的 现在完成时—基本概念 1.连接过去动作与现在结果 2.不强调具体时间，强调到现在为止 3.关键词：已经做完、尚未完成、一直影响到现在 4.本单元话题：科技、通讯、手机、交通 例句：Phones have changed our life. 现在完成时—肯定句结构 1.基本结构：主语 + have/has + 过去分词 2.复数/ I/you/we/they → have 3.单数/he/she/it/人名 → has 4.规则分词：动词 + ed 5.不规则分词：特殊记忆 例句：I have finished my homework. 人称搭配速记（必背） 1.I / you / we / they → have 2.he / she / it → has 3.单数名词（my dad, the app）→ has 4.复数名词（phones, people）→ have 口诀：单三has，其余have 现在完成时—否定句结构 1.否定式：主语 + haven’t/hasn’t + 过去分词 2.haven’t = have not 3.hasn’t = has not 4.表示“还没做、从未做” 例句：She hasn’t seen the new machine. 动词过去分词—规则变化 1.一般直接加 ed：work → worked 2.以 e 结尾加 d：live → lived 3.辅音+y 变 ied：study → studied 4.重读闭音节双写加 ed：stop → stopped 5.全部用于 have/has 之后 高频不规则过去分词（必背） 1.go → gone 2.see → seen 3.make → made 4.buy → bought 5.do → done 6.eat → eaten 7.take → taken 8.get → got/gotten 现在完成时核心用法1 1.过去动作对现在造成影响/结果 2.不出现具体过去时间（yesterday/last…） 3.常和 already/just 连用 例句：He has bought a phone.（现在有手机了） 现在完成时核心用法2 1.到目前为止已经/尚未完成 2.常搭配：yet（否定/疑问）、so far、before 3.强调“到现在这个时间点” 例句：I haven’t learned it yet. 现在完成时标志词（必背） 1.already 已经（肯定） 2.just 刚刚 3.never 从未 4.ever 曾经 5.yet 还（否定/疑问） 6.so far 到目前为止 7.before 以前 现在完成时—易错点1 1.错误：She have bought a new phone. 2.原因：第三人称单数必须用 has 3.正确：She has bought a new phone. 提醒：看到 he/she/人名 → 直接用 has 现在完成时—易错点2 1.错误：I have send a message. 2.原因：have/has 后必须用过去分词 3.正确：I have sent a message. 提醒：send → sent，不是原形 现在完成时—易错点3 1.错误：He has finished it yesterday. 2.原因：现在完成时不能和过去时间连用 3.正确：He has finished it. 提醒：有 yesterday/last… 用一般过去时 现在完成时—小总结 1.结构：have/has + 过去分词 2.人称：单三has，其余have 3.含义：过去→现在，影响/完成 4.标志：already/never/yet/so far 5.禁忌：不与具体过去时间连用 语法2 导入—动词不定式表目的 1.表示“为了……” 2.用来回答：Why…? 3.本单元三大结构： to do , in order to do , so as to do 4.后面一律跟动词原形 to do 表目的（最常用） 1.结构：… + to + 动词原形 2.位置：句中、句首都可以 3.最口语、最通用 例句：We use phones to talk. in order to 表目的 1.结构：in order to + 动词原形 2.比 to 稍正式 3.句首、句中都可以 4.句首优先用它 例句：In order to learn, he reads a lot. so as to 表目的 1.结构：so as to + 动词原形 2.较正式，多用于句中 3.绝对不能放在句首 例句：He gets up early so as to catch the bus. 三者对比表 结构 正式度 能否放句首 to do 最日常 能 in order to 较正式 能 so as to 正式 不能 否定形式（高频考点） 1.肯定：to do / in order to do / so as to do 2.否定： ￮in order not to do ￮so as not to do 3.不说：to not do 例句：He walks slowly in order not to fall. 同义句转换（写作加分） 1.I study hard to pass the exam. 2.= I study hard in order to pass the exam. 3.= I study hard so as to pass the exam. 三句意思一样，可自由替换 不定式易错点1 1.错误：I go there to learning English. 2.原因：to 后面必须跟动词原形 3.正确：I go there to learn English. 提醒：to 是符号，不是介词 不定式易错点2 1.错误：So as to get early, he runs. 2.原因：so as to 不能放句首 3.正确：To get early, he runs. 提醒：句首只用 to / in order to 不定式易错点3 1.错误：We play games order to have fun. 2.原因：in order to 不能少 in 3.正确：We play games in order to have fun. 不定式表目的—小总结 1.含义：为了做某事 2.三结构：to / in order to / so as to 3.都加动词原形 4.否定：in order not to / so as not to 5.so as to 不放在句首 用have/has填空 1.I _________ bought a new tablet. 2.My mother _________ used this app. 3.They _________ learned about 5G technology. 4.He _________ never taken a online class. 5.We _________ read the passage twice. 6.The phone _________ changed our life. have has have has have has 改为否定句 1.I have seen the new machine. 2.She has finished her homework. 3.They have visited the science museum. 4.It has rained for two hours. 5.We have talked about future cars. I haven’t seen the new machine. She hasn’t finished her homework. They haven’t visited the science museum. It hasn’t rained for two hours. We haven’t talked about future cars. 单项选择（现在完成时） 1.My father ______ a new watch. A. have buy B. has bought C. have bought 2.They ______ such a smart phone before. A. haven’t seen B. hasn’t seen C. not see 3.She ______ just cleaned her room. A. have B. has C. is B A B 单项选择（不定式） 1.People use apps ______ information easily. A. to get B. get C. getting 2.______ learn better, he takes notes. A. So as to B. To C. So as 3.He runs fast ______ be late. A. to not B. in order not to C. not to A B B 知识总结 1.现在完成时：have/has + 过去分词 2.单三用has，其余用have 3.标志词：already/never/yet/so far 4.目的状语：to / in order to / so as to 5.一律加原形；so as to 不句首 6.否定：in order not to 教学课件 Unit2 语法专项—— 现在完成时 + 动词不定式表目的 Thank you for listening! 32 $