Unit 7语法讲义2026-2027学年人教版英语八年级下册

本讲义聚焦初中英语现在完成时核心知识点，系统梳理其构成（have/has+过去分词）、两种用法（过去动作对现在影响、动作持续到现在）、句式转换（肯定、否定、疑问等）、时间标志词（already、yet等）及与一般过去时的区别，构建完整学习支架。 该资料通过对比辨析培养学生思维品质，配套单选、填空等多样练习题提升语言能力，参考答案助力课后查漏补缺增强学习能力。课中辅助教师清晰授课，课后帮助学生巩固知识，体现英语语法教学的系统性与实用性。

英语人教版八年级下册Unit 7语法讲义 一、现在完成时 1、构成 have / has + 过去分词（have/has done） 2、用法 ①表示过去发生或已经完成的动作对现在造成的影响或结果。 例：I finished my homework. I can watch TV now. I have already finished my homework. ②表示某一动作或状态从过去某一时间开始并一直持续到现在。 注：可以和表示延续的时间状语连用；表示持续动作或状态的动词多是延续性动词。 例：I started to learn English in 2020. I still learn English now. I have learned English for 6 years. 3、句式转换 肯定句：主 + have/has done + 其他. 否定句：主 + haven't / hasn't done + 其他. 一般疑问句：Have/Has + 主 + done + 其他？ 肯定回答：Yes, 主 + have/has. 否定回答：No, 主 + haven't / hasn't. 特殊疑问句：特殊疑问词 + have/has + 主 + done + 其他？ 4、时间标志词 already：用于肯定句，已经。例：I have already finished my homework. yet：用于疑问句，已经；用于否定句，还未、尚未。 例：Have you finished your homework yet? I haven't finished my homework yet. just：用于肯定句，刚刚。例：I have just finished my homework. ever：用于疑问句、肯定句，曾经。 例：Have you ever been to the zoo? I've ever read this book. never：从不，从未。例：I've never been to the zoo. 5、现在完成时与一般过去时的区别 一般过去时：表示过去某个时间发生的动作或存在的状态，与现在无关。 例：I had breakfast this morning.（今早吃了，只陈述过去这件事，不强调现在状态） 现在完成时：表示过去的动作对现在的影响，或是动作持续到现在。 例：I have had breakfast this morning.（我吃过早饭了，现在不饿了） --- 配套练习题 一、单项选择 1. I ____ my homework already. A. finish B. finished C. have finished D. will finish 2. —____ you ____ to the Great Wall? —Yes, I have. A. Did; go B. Have; been C. Were; go D. Do; go 3. He ____ here for five years. A. lives B. lived C. has lived D. will live 4. I ____ my breakfast. I am not hungry now. A. have B. had C. have had D. was having 5. —Have you read the book ____? —No, I haven’t. A. already B. yet C. just D. ever 6. She ____ to Beijing. She will come back next week. A. has gone B. went C. has been D. goes 7. I ____ never ____ such a beautiful place before. A. am; see B. was; saw C. have; seen D. do; see 8. They ____ in this town since 2018. A. live B. lived C. have lived D. are living 二、用所给动词的适当形式填空 1. I ____ (finish) my homework. You can look at it now. 2. He ____ (live) in this city for 10 years. 3. —____ you ____ (see) this film? —Yes, I ____ (see) it last week. 4. She ____ never ____ (visit) the museum. 5. They ____ (just arrive) at the station. 三、按要求句型转换 1. I have already cleaned my room.（改为否定句） ________________________________________________ 2. He has lived here for 3 years.（改为一般疑问句） ________________________________________________ 3. They have read the book.（对划线部分the book提问） ________________________________________________ 四、用already / yet / ever / never填空 1. Have you ____ ridden a horse? 2. I have ____ finished my lunch. 3. I haven’t packed my bag ____. 4. I have ____ been to Shanghai, so I really want to go there. 参考答案 一、单项选择 1. C already是现在完成时标志词 2. B 答句用have，问句用Have you been 3. C for five years 持续一段时间，现在完成时 4. C 动作对现在造成影响（现在不饿），用现在完成时 5. B 疑问句中用yet 6. A has gone to 去了某地（还没回来） 7. C never是现在完成时标志词 8. C since+过去时间，现在完成时 二、用所给动词的适当形式填空 1. have finished 2. has lived 3. Have; seen; saw 4. has; visited 5. have just arrived 三、按要求句型转换 1. I haven’t cleaned my room yet. 2. Has he lived here for 3 years? 3. What have they read? 四、用already / yet / ever / never填空 1. ever 2. already 3. yet 4. never 学科网（北京）股份有限公司 $