Unit 7 A Good Read 语法讲解（英语新教材人教版八年级下册）

该初中英语讲义通过知识框架系统构建现在完成时语法体系，从构成（肯定/否定/疑问句）、用法（影响性/持续性）、常用副词（already/yet等）、时间状语（for/since）、瞬间动词转换到易混结构（have been to等）递进梳理，结合例句与即时练习呈现知识脉络，突出重难点内在联系。 讲义亮点在于分层练习设计，即时练习如“瞬间动词转换”题（He ______ the army for five years）强化基础，综合练习含短文改错等提升语言运用能力，培养语言能力与思维品质。不同题型适配分层需求，辅助学生自主复习，为教师精准教学提供支持。

Unit 7 A good to read现在完成时语法详解 一、现在完成时的构成与基本结构 1. 肯定句结构 结构：主语 + have/has + 过去分词 + 其他 例句：I have finished my homework.（我已经完成了作业。） 练习题： ( ) 1. She ______ her homework already. A. finish B. finishes C. has finished 2. 否定句结构 结构：主语 + haven't / hasn't + 过去分词 + 其他 He hasn't seen the movie yet.（他还没看过那部电影。） 练习题： ( ) 2. We ______ the new teacher yet. A. haven't met B. didn't meet C. don't meet 3. 一般疑问句结构 结构：Have/Has + 主语 + 过去分词？ Yes, 主语 + have/has. No, 主语 + haven't/hasn't. 例句：Have you ever been to Beijing?（你曾经去过北京吗？） 练习题： ( ) 3. ______ he ever tried Chinese food? A. Did B. Has C. Does 二、现在完成时的两大用法 1. 影响性用法（已完成） 用法：动作发生在过去，但对现在造成了影响或结果。 例句： I have already had lunch.（Implies: I am full now.）（我已经吃过午饭了。——言外之意：我现在不饿。） She has lost her keys. She can't open the door.（她丢了钥匙，开不了门了。） 练习题： ( ) 4. I can't find my pen. Someone ______ it. A. took B. has taken C. takes 2. 持续性用法 用法：动作开始于过去，一直持续到现在。 例句： He has lived here for ten years.（他住在这里已经十年了。——现在还在住在这里。） 例句： They have known each other since childhood.（他们从小就认识。） 练习题： ( ) 5. My parents ______ married for 20 years. A. have been B. are C. were 三、常用副词 1. already 和 yet 的用法 用法：already 用于肯定句（句中/句末）；yet 用于否定句（句末）。 例句： Have you finished it yet? No, not yet.（你完成了吗？还没有。） I have already seen that film.（我已经看过那部电影了。） 练习题： ( ) 6. I haven't told him the news ______. A. already B. yet C. just 2. ever 和 never 的用法 用法：ever（曾经）多用于疑问句；never（从不）表示否定。 例句： Have you ever been to the space museum?（你曾经去过太空博物馆吗？） I have never visited the Great Wall.（我从未参观过长城。） 练习题： ( ) 7. This is the best movie I have ______ seen. A. ever B. never C. yet 3. just 的用法 用法：just 意为“刚刚”，常位于 have/has 之后。 例句：I've just made some cookies.（我刚刚做了一些饼干。） 练习题： ( ) 8. They ______ arrived at the station. A. just B. have just C. just have 【答案】B。考查just的位置。just放在have/has之后，过去分词之前。 四、for 与 since 的用法 1. for + 时间段 用法：for 后面接一段时间，表示动作持续了多久。 例句：She has waited for two hours.（她已经等了两个小时。） 练习题： ( ) 9. He has worked here ______ five years. A. since B. for C. in 2. since + 时间点 / 从句 用法：since 后面接时间点或一般过去时的从句，表示从过去某时开始。 例句：since 2010, since last week, since he came here I have studied English since 2015.（我从2015年开始学英语。） 练习题： ( ) 10. They have lived in this city ______ they got married. A. for B. since C. before 五、瞬间动词的转换 瞬间动词不能与时间段连用 用法：在现在完成时的持续性用法中，瞬间动词（短暂性动词）不能与for/since连用，必须转换为相应的延续性动词。 常见转换： borrow → keep buy → have die → be dead join → be in leave → be away 练习题： ( ) 11. He ______ the army for five years. A. has joined B. has been in C. joined 六、have been to / have gone to / have been in 的辨析 1. have/has been to（去过，已回） 用法：表示曾经去过某地，现在已经回来了。常与 ever, never, twice 等连用。 例句： I have been to Shanghai twice.（我去过上海两次。） 练习题： ( ) 12. —Where is Tom? —He ______ the library. A. has been to B. has gone to C. has been in 2. have/has gone to（去了，未回） 用法：表示去了某地，现在不在说话现场（在途中或已到达）。 例句：—Where is Tom? —He has gone to the library.（汤姆在哪里？——他去图书馆了。） 练习题： ( ) 13. My sister isn't here. She ______ Beijing. A. has been to B. has gone to C. went to 3. have/has been in（待在，持续） 用法：表示在某地待了多久。常与 for / since 连用。 例句： She has been in New York for a month.（她在纽约待了一个月。） 练习题： ( ) 11. He ______ the army for five years. A. has joined B. has been in C. joined 【综合练习】 一、单项选择 ( ) 1. I ______ this film twice. A. see B. saw C. have seen ( ) 2. She hasn't finished her work ______. A. already B. yet C. just ( ) 3. —Where is your brother? —He ______ to the post office. A. has been B. has gone C. went ( ) 4. My grandfather ______ for five years. A. has died B. has been dead C. died ( ) 5. They have known each other ______ they were children. A.for B. since C. Before 二、用所给词的正确形式填空 1. I __________ (finish) reading this book already. 2. She __________ (not visit) the museum yet. 3. __________ you ever __________ (eat) Indian food? 4. He __________ (live) in this city since 2010. 5. They __________ (be) friends for a long time. 三、句型转换 1. She has already cleaned the room. (改为否定句) She __________ __________ the room yet. 2. He has finished his homework. (改为一般疑问句) __________ he __________ his homework? 3. I have been to the Great Wall. (改为否定句) I __________ __________ been to the Great Wall. 4. They have lived here since 2015. (对划线部分提问) __________ __________ have they lived here? 5. He bought the book two days ago. (改为同义句) He __________ __________ the book for two days. 四、完成句子 1. 我已经看过这部电影了。 I __________ __________ this movie. 2. 你曾经去过上海吗？ __________ you ever __________ to Shanghai? 3. 他还没吃早饭。 He __________ __________ breakfast yet. 4. 她离开家乡已经三年了。 She __________ __________ away from her hometown for three years. 5. 我在这里住了十年了。 I __________ __________ here for ten years. 五、短文改错 下列句子中各有一处错误，请找出并改正。 1. I have went to the library just now.______________ 2. She hasn't finished her work already.______________ 3. He has died for three years.___________________ 4. —Where is your father? —He has been to the supermarket.___________ 5.I have seen this film last week.___________ ( 1 ) 学科网（北京）股份有限公司 $ Unit 7 A good to read现在完成时语法详解 一、现在完成时的构成与基本结构 1. 肯定句结构 结构：主语 + have/has + 过去分词 + 其他 例句：I have finished my homework.（我已经完成了作业。） 练习题： ( ) 1. She ______ her homework already. A. finish B. finishes C. has finished 【答案】C。考查现在完成时的肯定结构。主语She是第三人称单数，用has + 过去分词。 2. 否定句结构 结构：主语 + haven't / hasn't + 过去分词 + 其他 He hasn't seen the movie yet.（他还没看过那部电影。） 练习题： ( ) 2. We ______ the new teacher yet. A. haven't met B. didn't meet C. don't meet 【答案】A。考查现在完成时的否定结构。yet常与现在完成时连用，否定用haven't met。 3. 一般疑问句结构 结构：Have/Has + 主语 + 过去分词？ Yes, 主语 + have/has. No, 主语 + haven't/hasn't. 例句：Have you ever been to Beijing?（你曾经去过北京吗？） 练习题： ( ) 3. ______ he ever tried Chinese food? A. Did B. Has C. Does 【答案】B。考查现在完成时的一般疑问句。ever常与现在完成时连用，用Has。 二、现在完成时的两大用法 1. 影响性用法（已完成） 用法：动作发生在过去，但对现在造成了影响或结果。 例句： I have already had lunch.（Implies: I am full now.）（我已经吃过午饭了。——言外之意：我现在不饿。） She has lost her keys. She can't open the door.（她丢了钥匙，开不了门了。） 练习题： ( ) 4. I can't find my pen. Someone ______ it. A. took B. has taken C. takes 【答案】B。考查影响性用法。找不到笔是结果，表示有人拿走了（对现在造成影响），用现在完成时。 2. 持续性用法 用法：动作开始于过去，一直持续到现在。 例句： He has lived here for ten years.（他住在这里已经十年了。——现在还在住在这里。） 例句： They have known each other since childhood.（他们从小就认识。） 练习题： ( ) 5. My parents ______ married for 20 years. A. have been B. are C. were 【答案】A。考查持续性用法。for 20 years表示一段时间，用现在完成时表示状态持续。 三、常用副词 1. already 和 yet 的用法 用法：already 用于肯定句（句中/句末）；yet 用于否定句（句末）。 例句： Have you finished it yet? No, not yet.（你完成了吗？还没有。） I have already seen that film.（我已经看过那部电影了。） 练习题： ( ) 6. I haven't told him the news ______. A. already B. yet C. just 【答案】B。考查yet的用法。否定句中用yet。 2. ever 和 never 的用法 用法：ever（曾经）多用于疑问句；never（从不）表示否定。 例句： Have you ever been to the space museum?（你曾经去过太空博物馆吗？） I have never visited the Great Wall.（我从未参观过长城。） 练习题： ( ) 7. This is the best movie I have ______ seen. A. ever B. never C. yet 【答案】A。考查ever的用法。ever seen表示“曾经看过”，用于最高级后加强语气。 3. just 的用法 用法：just 意为“刚刚”，常位于 have/has 之后。 例句：I've just made some cookies.（我刚刚做了一些饼干。） 练习题： ( ) 8. They ______ arrived at the station. A. just B. have just C. just have 【答案】B。考查just的位置。just放在have/has之后，过去分词之前。 四、for 与 since 的用法 1. for + 时间段 用法：for 后面接一段时间，表示动作持续了多久。 例句：She has waited for two hours.（她已经等了两个小时。） 练习题： ( ) 9. He has worked here ______ five years. A. since B. for C. in 【答案】B。考查for的用法。five years是时间段，用for。 2. since + 时间点 / 从句 用法：since 后面接时间点或一般过去时的从句，表示从过去某时开始。 例句：since 2010, since last week, since he came here I have studied English since 2015.（我从2015年开始学英语。） 练习题： ( ) 10. They have lived in this city ______ they got married. A. for B. since C. before 【答案】B。考查since的用法。they got married是过去的时间点，用since。 五、瞬间动词的转换 瞬间动词不能与时间段连用 用法：在现在完成时的持续性用法中，瞬间动词（短暂性动词）不能与for/since连用，必须转换为相应的延续性动词。 常见转换： borrow → keep buy → have die → be dead join → be in leave → be away 练习题： ( ) 11. He ______ the army for five years. A. has joined B. has been in C. joined 【答案】B。考查瞬间动词转换。join是瞬间动词，不能与for连用，应转换为has been in。 六、have been to / have gone to / have been in 的辨析 1. have/has been to（去过，已回） 用法：表示曾经去过某地，现在已经回来了。常与 ever, never, twice 等连用。 例句： I have been to Shanghai twice.（我去过上海两次。） 练习题： ( ) 12. —Where is Tom? —He ______ the library. A. has been to B. has gone to C. has been in 【答案】B。考查have gone to的用法。问Tom在哪里，答“他去了图书馆（人还没回来）”，用has gone to。 2. have/has gone to（去了，未回） 用法：表示去了某地，现在不在说话现场（在途中或已到达）。 例句：—Where is Tom? —He has gone to the library.（汤姆在哪里？——他去图书馆了。） 练习题： ( ) 13. My sister isn't here. She ______ Beijing. A. has been to B. has gone to C. went to 【答案】B。考查have gone to的用法。人不在现场，表示去了某地，用has gone to。 3. have/has been in（待在，持续） 用法：表示在某地待了多久。常与 for / since 连用。 例句： She has been in New York for a month.（她在纽约待了一个月。） 练习题： ( ) 11. He ______ the army for five years. A. has joined B. has been in C. joined 【答案】B。考查瞬间动词转换。join是瞬间动词，不能与for连用，应转换为has been in。 【综合练习】 一、单项选择 ( ) 1. I ______ this film twice. A. see B. saw C. have seen ( ) 2. She hasn't finished her work ______. A. already B. yet C. just ( ) 3. —Where is your brother? —He ______ to the post office. A. has been B. has gone C. went ( ) 4. My grandfather ______ for five years. A. has died B. has been dead C. died ( ) 5. They have known each other ______ they were children. A.for B. since C. Before 【答案】1. C；2. B；3. B；4. B；5. B 1. C。考查现在完成时。twice表示“两次”，常与现在完成时连用。 2. B。考查yet的用法。否定句用yet。 3. B。考查have gone to。人不在现场，表示“去了某地”，用has gone to。 4. B。考查瞬间动词转换。die是瞬间动词，不能与for连用，转换为be dead。 5. B。考查since的用法。since + 时间点/从句。 二、用所给词的正确形式填空 1. I __________ (finish) reading this book already. 2. She __________ (not visit) the museum yet. 3. __________ you ever __________ (eat) Indian food? 4. He __________ (live) in this city since 2010. 5. They __________ (be) friends for a long time. 【答案】1. have finished。already常用于现在完成时肯定句。 2. hasn't visited。yet常用于现在完成时否定句。 3. Have; eaten。ever常用于现在完成时疑问句。 4. has lived。since 2010表示时间起点，用现在完成时。 5. have been。for a long time表示时间段，用现在完成时。 三、句型转换 1. She has already cleaned the room. (改为否定句) She __________ __________ the room yet. 2. He has finished his homework. (改为一般疑问句) __________ he __________ his homework? 3. I have been to the Great Wall. (改为否定句) I __________ __________ been to the Great Wall. 4. They have lived here since 2015. (对划线部分提问) __________ __________ have they lived here? 5. He bought the book two days ago. (改为同义句) He __________ __________ the book for two days. 【答案】1. hasn't cleaned。肯定句改为否定句：has already → hasn't...yet。 2. Has; finished。现在完成时的一般疑问句：Has + 主语 + 过去分词？ 3. have never。否定句用never。 4. How long。对时间段提问用How long。 5. has had。buy是瞬间动词，转换为have（延续性），时间状语改为for two days。 四、完成句子 1. 我已经看过这部电影了。 I __________ __________ this movie. 2. 你曾经去过上海吗？ __________ you ever __________ to Shanghai? 3. 他还没吃早饭。 He __________ __________ breakfast yet. 4. 她离开家乡已经三年了。 She __________ __________ away from her hometown for three years. 5. 我在这里住了十年了。 I __________ __________ here for ten years. 【答案】1 have seen。already常省略。 2. Have; been。have been to表示“去过”。 3. hasn't had。yet用于否定句。 4. has been。leave → be away。 5 have lived。for ten years表示时间段。 五、短文改错 下列句子中各有一处错误，请找出并改正。 1. I have went to the library just now.______________ 2. She hasn't finished her work already.______________ 3. He has died for three years.___________________ 4. —Where is your father? —He has been to the supermarket.___________ 5.I have seen this film last week.___________ 【答案】1. went → gone。现在完成时结构：have + 过去分词（gone）。 2. already → yet。否定句用yet。 3. has died → has been dead。die是瞬间动词，不能与for连用。 4. been to → gone to。人不在现场，表示“去了某地”，用has gone to。 5. 去掉last week 或 have seen → saw。last week是过去时间，不能与现在完成时连用；改为一般过去时。enough ( 1 ) 学科网（北京）股份有限公司 $