Unit 6 Celebrations-2026-2027学年八年级英语上册语法专项（北师大版）

Unit 6 Celebrations 语法专项 章 语法概览 ★时间状语从句(as soon as等引导词) ★现在完成时复习与综合运用 语法精讲精练一 1.时间状语从句的定义与功能 定义：时间状语从句(Time Adverbial Clause))是主从复合句中表示时间的从句，用来说明 主句动作发生的时间、先后顺序或持续时间。 结构：引导词+从句（主语+谓语）+主句 功能 示例 说明 When the bell rang,the students 说明主句动作发生的时间点 从句动作先发生或同时发生 ran out. I will call you as soon as I 从句动作一发生，主句动作立 说明两个动作的先后顺序 arrive 即发生 He waited until his mother came 表示主句动作持续到某一时间 从句动作结束，主句动作停止 back. She sang while she was 表示两个动作同时进行 从句与主句动作同时进行 walking 2.时间状语从句的常见引导词（中考重点） 引导词 含义 用法要点 例句 强调两个动作几乎同时发 As soon as I get home,I as soon as …就… 生；从句用一般现在时表 will call you 将来（主将从现） 可表示点时间或段时间； When I was young,I liked when 当…时 从句动作可与主句同时或 reading. 先后 While I was sleeping, 强调两个动作同时进行： while 当…期间 someone knocked at the 从句动词常用延续性 door. 主句用延续性动词（肯定 He worked until midnight unt位l 直到… 句)；not.until表示“直 /I didn't leave until he 到…才” came 主句动作在从句动作之前 Please close the door before 在…之前 发生 before you leave. 主句动作在从句动作之后 After he finished his after 在…之后 发生 homework.he went to bed. 从句用一般过去时，主句 He has lived here since he since 自从… 用现在完成时 moved to the city. 3.核心考点一一“主将从现”原则（中考必考） 定义：在时间状语从句中，如果主句是一般将来时（或祈使句/含情态动词），从句必须 用一般现在时表示将来，不能用将来时。 结构 公式 示例 主句：wil/be going to+动词 I will tell him as soon as he 主句将来时+从句一般现在时 原形；从句：一般现在时 comes back」 主句祈使句+从句一般现在时 主句：动词原形开头 Please call me when you arrive. 主句含情态动词+从句一般现 主句：can/may/must+动词原 You can go out after you finish 在时 形 your homework. 易错警告：学生易写成“I will call you as soon as he will come back.”(错误)→正确为“I will call you as soon as he comes back." 4.易混辨析（中考高频） 易混点 区别 示例 when vs while when:可接点时间或段时间，可表示 I was reading when the phone rang. “突然发生”；while:只接段时间，强 点时间)→while不能这样用；While I 调“在…期间” was reading,she came in until:主句用延续性动词，意为“直 until vs 到…（一直做)”；not.until:主句 He waited until 10:00./He didn't leave not...until 用非延续性动词，意为“直到…才 until 10:00. 做” ass00nas强调“一…就…”，动 As soon as I saw her,I knew the truth as soon as与 作连接更紧密；when只表示时间点， (紧接)When I saw her,.I said hello. when的区别 不强调紧接 (一般时间) 5.特殊注意点 hardly..when/no sooner.han(“一…就…”的倒装结构)：中考难度较大，仅作拓 展。如Hardly had I arived when it began to rain.初二不重点要求。 since从句的时间起点：注意主句用现在完成时，从句用一般过去时。如：He has changed a lot since I last saw him 二、专项训练（中考/名校月考难度，8-10题/大题，共3大题） (一)单项选择 1.I will give the book to Mike as soon as he back. A.comes B.came C.will come D.is coming 2. I was reading,my mother was cooking dinner. A.When B.While C.As soon as D.Until 3.The children didn't leave the park their mother called them. A.until B.when C.while D.as soon as 4.Please finish your homework you watch TV. A.after B.before C.until D.while 5.He has been feeling better since he the medicine. A.takes B.took C.will take D.is taking 6.We will go to the zoo if it tomorrow. A.doesn't rain B.won't rain C.isn't raining D.didn't rain 7.I was watching TV someone knocked on the door. A.while B.when C.as soon as D.after 8 he got to the station,the train had already left. A.When B.While C.As soon as D.Until 9.The little girl cried she saw her mother. A.until B.as soon as C.while D.before 10.-When will you call me? A.while B.as soon as C.until D.before (二)语法填空 阅读下面短文，在空白处填入括号内所给单词的适当形式或填入合适的引导词（每空一词）。 My name is Tom.Last Sunday,I went to visit my grandparents.1 (when /while)I got there, my grandma was cooking in the kitchen.I said hello to her,and she smiled happily.I stayed with them for the whole day. My grandpa is a retired teacher.He often tells me,"You will learn a lot 2. you read more books."I follow his advice.Every evening,3. (as soon as/until)I finish my homework,I start reading. Last week,I had an important exam.I studied hard 4. the exam was over.I felt nervous 5. (when/while)I was waiting for the result.The result came out yesterday.6. I saw my score,I jumped with joy.I got a good grade! My parents were very happy.They said,"You can relax 7. you take a rest.But don't stop working hard."I nodded. I have leamned a lot since I 8. (enter)middle school.I believe that I will become better and better 9. I keep trying.I will also help others 10. (when /while)I can (三)完成句子 l.我一到北京就给你打电话。I will call you I arrive in Beijing 2.请在你离开前关灯。Please turn off the lights you 3.他一直等到妈妈回来。He waited his mother back 4.直到他告诉我，我才知道真相。I know the truth he told me. 5.她一边唱歌一边跳舞。She was singing she dancing. 6.自从他搬到这座城市，他就一直住在这里。He has lived here he to this city 7.当我正在做作业时，电话响了。 I was doing my homework,the phone 8.你离开教室后记得关门。Remember to close the door you the classroom 9.他读完这本书后，会把它还给你。He will1 etum the book to you he reading it. 10.我们一到学校就开始打扫卫生。We started to clean the classroom we got to school. 三、 参考答案 (一)单项 1.A;2.B;3.A氵4.B;5.B6.A;7.B;8.A;9.B;10.B 选择 (二)语法 1.When 2.if when 3.as soon as 4.until 5.while 6.As soon as 7.after; 填空 8.entered 9.if/as long as 10.when (三)完成 1.as soon as 2.before;leave 3.until;came 4.didn't;until 5.while;was 6.since; 句子 moved 7.When;rang 8.after;leave 9.after;finishes 10.as soon as 章 语法精讲精练二 1.定义与构成 定义：现在完成时表示过去发生的动作或状态对现在造成的影响或结果，或者从过 去持续到现在的动作或状态。 构成：主语+have/has+过去分词(done) 人称 助动词 过去分词 例句 I have finished my I/You/We/They have done homework He/She/It has done She has visited Beijing. Have/Has+主语+ 疑问句 Have you ever been to 过去分词？ Shanghai? 主语+haven't/hasn't 否定句 +过去分词 He hasn't anived yet. 【考点】过去分词的变化规则（规则变化加-ed,不规则变化需熟记）；have/has 的选择取决于主语人称。 2.三种基本用法（中考核心) 用法 含义 标志词/句型 例句 ①已完成（影响现 过去发生的动作已结 I have already eaten already,yet,just,ever, breakfast..(现在不饿 在) 束，对现在有影响 never 了) 强调“曾经做过某 ②经验（经历过） ever,never,before,in Have you ever seen 事” the past this movie? ③持续（从过去持 动作或状态从过去某 since,for,how long,so He has lived here for 时开始，一直持续到 续到现在) far ten years. 现在 【考点】用法③必须用延续性动词，非延续性动词（如aive,die,buy）需转换为 相应的延续性短语。 3.常用时间状语 类别 时间状语 例句 完成（影响） already(肯定句)，yet(否 I have just cleaned the room. 定/疑问)，just,ever,never 经验 ever,never,before,once,twice She has never been abroad. since+时间点/从句，for+时 持续 We have known each other 间段，so far,.these days since 2015. 【考点】already与yet的位置：already放在助动词后、过去分词前；yet放在句 末。 I have already seen that film./Have you finished your homework yet? 4.延续性动词与非延续性动词的转换（中考重难点） 非延续性动词（瞬间动作）不能与for+时间段或since+时间点连用，需改为 对应的延续性动词或短语。 非延续性动词 延续性动词/短语 例句（对比） I have had this bike for two buy have years.(x have bought) He has kept the book since last borrow keep week.(x has borrowed) She has been in Beijing for a come/go be in/at month.（×has come) The old man has been dead for die be dead ten years.(x has died) They have been away from leave be away from home for three days. The shop has been open since 8 open be open a.m The museum has been closed close be closed for a week. The movie has been on for ten begin/start be on minutes. He has been in the club since join be a member of/be in last month getup be up He has been up for an hour. The baby has been asleep for fall asleep be asleep two hours. 【考点】中考常考语法填空和完成句子中“用延续性动词替换非延续性动词”。 5.现在完成时vs一般过去时（易混辨析） 对比项 现在完成时 一般过去时 强调过去动作对现在的影响 强调过去发生的动作，与现 侧重 或持续到现在 在无关 yesterday,last week,in 2020, already,yet,just,ever,never 时间状语 two days ago,.when引导的从 since,for,so far 句 I have seen the film. (我看过 例句 I saw the film yesterday. (只是 了，了解内容) 陈述昨天看了) 关键词 “现在”与“过去”有联系 动作发生时间已明确过去 【考点】若句中出现明确的过去时间（如yesterday,last year,just now),则必用一 般过去时，不可用现在完成时。 二、专项训练 (一)单项选择(（共10分) 从A、B、C、D四个选项中，选出可以填入空白处的最佳选项。 1. you ever to the Great Wall? -Yes,I have.I went there last year. A.Did;go B.Have;gone C.Have;been D.Will;go 2.My father Shanghai for two weeks.He will come back next Friday. A.has been to B.has gone to C.has been in D.went to 3.-Where is Tom? A.has been to B.has gone to C.went to D.goes to 4.1 this book for three weeks.I must return it today. A.have borrowed B.have kept C.kept D.borrowed 5.—How long you the mobile phone? -Since I was twelve. A.have;bought B.did;buy C.have;had D.do;have 6.She her homework yet.She is still doing it. A.hasn't finished B.didn't finish C.doesn't finish D.won't finish 7.-Is your father in? A.has been to B.has gone to C.went to D.has been in 8. you the film The Wandering Earth II? -Not yet.I'm going to watch it this weekend. A.Did;see B.Have;seen C.Do;see D.Will;see 9.We each other since we were in primary school A.know B.have known C.knew D.will know 10.The Smiths in China for ten years,but they still can't speak Chinese well A.have lived B.lived C.have been lived D.were living (二)语法填空（共10分) 阅读下面短文，在空白处填入括号内所给单词的适当形式，使短文通顺、完整。 My name is Li Hua.I 1. (have)this bike since my 12th birthday.It 2. (be)a gift from my uncle.I 3. (ride)it to school every day for the past three years. Last week,my friend Wang Lei 4. (borrow)my bike and he hasn't 5. (return)it yet.I think he 6. (keep)it for almost a week.I need to get it back because I have 7. (join)a cycling club,and I haven't 8. (attend)any activity so far.My mother said I could buy a new one if I couldn't get the old one back.But I really like my old bike.I 9. (have)it for so long that it feels like an old friend.Do you have something that you 10. (own)for a long time? (三)完成句子（共20分) 1.我己经去过那个博物馆两次了。 I to that museum twice. 2.他加入游泳俱乐部三年了。 He a member of the swimming club for three years. 3.你曾经看过这部纪录片吗？ you ever this documentary? 4.我妈妈还没有回来。 My mother back yet. 5.自从我们上次见面以来，已经过去五年了。 It five years since we last met. 6.这本词典我已经借了两个月了。 I this dictionary for two months 7.他们已经离开家乡十年了。 They from their hometown for ten years. 8.你听说过那首新歌吗？ you that new song? 9.他今天早上就已经做完作业了。 He his homework this morning. 10.到目前为止，我已经读了五本英文小说了。 So far,I five English novels. 三、参考答案 (一)单项 选择 1.C;2.C;3.B;4.B;5.C;6.A;7.B;8.B;9.B;10.A (二)语法 1.have had 2.was 3.have ridden 4.borrowed 5.returned 6.has kept 填空 7.joined ;8.attended 9.have had 10.have owned (三)完成 1.have been 2.has been 3.Have,seen 4.hasn't come 5.has been 6.have 句子 kept 7.have been away ;8.Have,heard of 9.has already finished 10.have read