Unit3 Growing Up 核心语法-2025-2026学年人教版八年级英语下册

Unit3 Growing Up 核心语法：现在完成时延续性用法&时态辨析 一、语法精讲 语法点一：现在完成时的延续性用法 1. 核心概念 本单元现在完成时重点强调“从过去开始、持续到现在的动作或状态”，常与for（接时间段）、since（接时间点/从句）等延续性时间状语连用，需使用延续性动词。成长话题中多用于描述习惯、经历的持续，如“学习某项技能多久”“保持某种习惯至今”等。 例：① He has learned English for five years.（他学英语五年了，动作持续至今）；② We have lived in this city since 2018.（自从2018年我们就住在这座城市，状态持续至今）。 2. 延续性与非延续性动词转换（易错） 非延续性动词（如buy、borrow、leave等）不能与for/since连用，需转换为对应的延续性动词/短语，常见转换如下： 非延续性动词 对应延续性动词/短语 真题例句（改编，贴合成长主题） buy have 【2025年河南中考】He has had this bike for three years. It was a gift for his tenth birthday. borrow keep 【2025年江苏苏州中考模拟】I have kept this book for a week. I need to return it to the library. leave be away 【2025年浙江杭州中考】His father has been away from home for two months for work. begin/start be on 【2025年山东济南中考模拟】She has been on the school basketball team since last year. 3. 关键用法（易错点突破） for与since辨析：for后接时间段（for three days/ten years），since后接过去时间点（since 2020/since last Monday）或一般过去时从句（since he was a child）。 例：【2025年湖北武汉中考】She has practiced dancing since she was five years old.（since接从句，表成长经历）。 (1) 延续性动词误区：不可直接用非延续性动词接for/since，如不可说He has bought the bike for a year.，需改为He has had the bike for a year.。 (2) 句型转换：由“非延续性动词+过去时间点”改为延续性表达时，需替换动词并结合for/since，如He bought the bike in 2022.→He has had the bike since 2022.。 语法点二：现在完成时与一般过去时的区别 1. 核心差异 两者均涉及过去动作，但侧重点不同：现在完成时强调“过去动作对现在的影响或持续到现在”，无具体过去时间状语；一般过去时仅表示“过去某个时间发生的动作”，与现在无关，常接具体过去时间状语（yesterday、last year等），贴合成长中对“过往经历”与“持续状态”的区分描述。 2. 时态用法对比 时态 核心侧重点 时间状语 真题例句 现在完成时 过去动作对现在的影响/持续到现在 for、since、already、yet、ever、never 【2025年安徽中考】He has improved his English a lot. He can talk with foreigners now. 一般过去时 过去某个具体时间的动作，与现在无关 yesterday、last week、in 2023、just now 【2025年湖南长沙中考模拟】He learned to swim when he was six years old. 易错提醒：1. 出现具体过去时间状语（如last year、yesterday）时，必须用一般过去时，不可用现在完成时；2. 现在完成时的疑问句回答，若用具体过去时间说明，需切换为一般过去时，如—Have you seen him? —Yes, I saw him yesterday.。 2、 语法综合练习 （一）单项选择 (1) 【2025年河南中考】—How long have you ______ this book? —For two weeks.（ ） A. borrowed B. kept C. bought D. lent (2) 【2025年陕西中考模拟】He ______ in this school since 2021. He loves his teachers and classmates.（ ） A. studies B. studied C. has studied D. will study (3) 【2025年四川成都中考】—When ______ you ______ to play the piano? —At the age of five.（ ） A. do; start B. did; start C. have; started D. will; start (4) 【2025年福建福州中考模拟】She ______ away from home for three days. Her parents are worried about her.（ ） A. has been B. has left C. left D. was away (5) 【2025年湖北襄阳中考】He ______ never ______ to Beijing before. He wants to go there this summer.（ ） A. has; been B. have; been C. has; gone D. have; gone (6) 【2025年江苏南京中考】My brother ______ the army last year. He has been a soldier for a year.（ ） A. joined B. has joined C. joins D. will join (7) 【2025年山东青岛中考模拟】They ______ in this neighborhood for ten years. They know everyone here.（ ） A. live B. lived C. have lived D. will live (8) 【2025年浙江宁波中考】—Have you finished your homework? —Yes, I ______ it ten minutes ago.（ ） A. finish B. finished C. have finished D. will finish (9) 【2025年江西中考】The film ______ for twenty minutes. Hurry up!（ ） A. has begun B. has been on C. began D. will begin (10) 【2025年云南昆明中考模拟】—How long has he ______ his pet dog? —Since he was seven.（ ） A. had B. bought C. got D. picked （二）用所给词的适当形式填空 (1) 【2025年广东广州中考】He ______ (keep) this dictionary for three years. It helps him a lot in study. (2) 【2025年甘肃兰州中考】My parents ______ (live) in Lanzhou since they got married. (3) 【2025年山西中考模拟】She ______ (start) to learn drawing when she was eight. She is good at it now. (4) 【2025年贵州贵阳中考】He ______ (not see) his uncle for a long time. He misses him very much. (5) 【2025年海南海口中考模拟】They ______ (borrow) the book from the library yesterday. They have to return it next week. (6) 【2025年辽宁沈阳中考】The meeting ______ (be) on for ten minutes. Please come in quietly. (7) 【2025年青海西宁中考模拟】I ______ (never visit) the Great Wall before. I plan to go there this summer. (8) 【2025年湖北武汉中考】He ______ (leave) his hometown five years ago. He has been away for five years. (9) 【2025年江苏苏州中考】We ______ (know) each other since we were in primary school. (10) 【2025年安徽中考模拟】She ______ (buy) this toy bear when she was five. She has had it for six years. （三）补全对话（2篇，改编自中考情景对话，贴合成长主题） 对话1（场景：谈论成长中的学习经历） 备选词：has kept, studied, have known, began, has been A: Hi, Lucy! How long have you ______ English? B: I have studied English for six years. I ______ to learn it when I was seven. A: Do you know Tom? B: Yes. We ______ each other since primary school. He is good at English too. A: What about this dictionary? Is it yours? B: Yes. I ______ it for three years. It's my favorite study tool. A: I see. He ______ in this school for two years. He came here in 2023. 对话2（场景：分享成长中的生活变化） 备选词：lived, has been away, bought, have had, left A: Where did you live before moving here? B: I ______ in a small town with my grandparents. A: How long did you live there? B: I lived there until I was ten. Then my family ______ the town and moved to the city. A: Do you miss the town? B: Yes. My grandparents still live there. I ______ from them for a month. I plan to visit them this weekend. A: What's this in your hand? B: It's a toy car. My father ______ it for me when I was eight. I ______ it for seven years. It's a special gift. （四）按要求改写句子 1. He borrowed the book two weeks ago.（改为延续性表达） He ______ ______ the book for two weeks. 2. She has lived here since 2020.（改为一般过去时） She ______ here in 2020. 3. He bought the bike in 2022.（改为现在完成时延续性表达） He ______ ______ the bike since 2022. 4. They have known each other for five years.（对划线部分提问，划线部分：for five years） ______ ______ have they known each other? 5. The film began ten minutes ago.（改为现在完成时延续性表达） The film ______ ______ ______ for ten minutes. 6. He left home yesterday.（改为延续性表达） He ______ ______ ______ from home since yesterday. 7. I have finished my homework.（改为一般过去时，用just now） I ______ my homework just now. 8. She has studied dancing since she was six.（对划线部分提问，划线部分：since she was six） ______ ______ has she studied dancing? 9. They joined the club last year.（改为现在完成时） They ______ ______ in the club for a year. 10. He has never been to Shanghai.（改为一般疑问句） ______ he ______ ______ to Shanghai? 三、答案与详细解析 （一）单项选择 (1) B 解析：How long提示用延续性动词，borrow、buy、lend均为非延续性动词，keep为延续性动词。【2025河南中考考点：延续性动词用法】 (2) C 解析：since 2021提示现在完成时，主语he是单数，用has studied。【2025陕西模拟考点：现在完成时与since连用】 (3) B 解析：答句At the age of five是具体过去时间，用一般过去时，疑问句借助did，后接动词原形start。【2025成都中考考点：一般过去时用法】 (4) A 解析：for three days提示现在完成时，leave为非延续性动词，需转换为be away，用has been。【2025福州模拟考点：非延续性动词转换】 (5) A 解析：never提示现在完成时，主语he是单数，用has；have been to表示“去过某地（已回）”，符合语境。【2025襄阳中考考点：现在完成时have been to用法】 (6) A 解析：last year是具体过去时间，用一般过去时，join的过去式是joined；第二句for a year提示现在完成时，用has been呼应。【2025南京中考考点：时态辨析】 (7) C 解析：for ten years提示现在完成时，主语they是复数，用have lived。【2025青岛模拟考点：现在完成时延续性用法】 (8) B 解析：ten minutes ago是具体过去时间，用一般过去时，finish的过去式是finished。【2025宁波中考考点：一般过去时时间状语】 (9) B 解析：for twenty minutes提示现在完成时，begin为非延续性动词，需转换为be on，用has been on。【2025江西中考考点：非延续性动词转换】 (10) A 解析：How long提示用延续性动词，bought、got、picked均为非延续性动词，had为延续性动词。【2025昆明模拟考点：延续性动词用法】 （二）用所给词的适当形式填空 (1) has kept 解析：for three years提示现在完成时，主语he是单数，keep的过去分词是kept。【2025广州中考考点：现在完成时延续性用法】 (2) have lived 解析：since they got married提示现在完成时，主语my parents是复数，用have lived。【2025兰州中考考点：现在完成时与since从句连用】 (3) began 解析：when she was eight是具体过去时间，用一般过去时，begin的过去式是began。【2025山西模拟考点：一般过去时用法】 (4) hasn't seen 解析：for a long time提示现在完成时，主语he是单数，否定式用hasn't，see的过去分词是seen。【2025贵阳中考考点：现在完成时否定句】 (5) borrowed 解析：yesterday是具体过去时间，用一般过去时，borrow的过去式是borrowed。【2025海口模拟考点：一般过去时时间状语】 (6) has been 解析：for ten minutes提示现在完成时，be on表延续，用has been。【2025沈阳中考考点：非延续性动词转换】 (7) have never visited 解析：never提示现在完成时，主语I用have，visit的过去分词是visited。【2025西宁模拟考点：现在完成时标志词】 (8) left 解析：five years ago是具体过去时间，用一般过去时，leave的过去式是left。【2025武汉中考考点：一般过去时用法】 (9) have known 解析：since we were in primary school提示现在完成时，主语we是复数，know的过去分词是known。【2025苏州中考考点：现在完成时延续性用法】 (10) bought 解析：when she was five是具体过去时间，用一般过去时，buy的过去式是bought。【2025安徽模拟考点：一般过去时用法】 （三）补全对话 对话1 答案：studied; began; have known; has kept; has been 解析：第一空How long提示现在完成时，用studied；第二空when she was seven提示一般过去时，用began；第三空since primary school提示现在完成时，用have known；第四空for three years提示现在完成时，用has kept；第五空for two years提示现在完成时，用has been，贴合成长学习场景。 对话2 答案：lived; left; has been away; bought; have had 解析：第一空结合问句时态，用一般过去时lived；第二空and连接并列动作，用left（过去式）；第三空for a month提示现在完成时，转换为has been away；第四空when I was eight提示一般过去时，用bought；第五空for seven years提示现在完成时，用have had，呼应成长生活变化主题。 （四）按要求改写句子 (1) has kept 解析：borrow为非延续性动词，转换为keep，结合for two weeks用现在完成时has kept。 (2) lived 解析：改为一般过去时，live的过去式是lived，对应in 2020。 (3) has had 解析：buy为非延续性动词，转换为have，结合since 2022用现在完成时has had。 (4) How long 解析：对时间段for five years提问，用how long。 (5) has been on 解析：begin为非延续性动词，转换为be on，结合for ten minutes用现在完成时has been on。 (6) has been away 解析：leave为非延续性动词，转换为be away，结合since yesterday用现在完成时has been away。 (7) finished 解析：just now提示一般过去时，finish的过去式是finished。 (8) How long 解析：对时间状语since she was six提问，用how long。 (9) have been 解析：join为非延续性动词，转换为be in，结合for a year用现在完成时have been。 (10) Has; never been 解析：现在完成时一般疑问句，将has提前，never位置不变，been保留。 学科网（北京）股份有限公司 $