Unit 6 Detectives 过去进行时-2025-2026学年八年级英语下册语法知识点全解（北师大版）

初二下册北师大版 【语法专版】 Unit 6 Detectives 语法专版 【专题】过去进行时 Unit6 Detectives语法专项突破 考频分析 北师大版8下Unit6 Detectives中，过去进行时是重点语法点，考频占时态考点的I5%左右，主要 分布在核心题型：单项选择(1-2题)、完形填空(2-3题)、语法填空(1-2题)、阅读理解（辅助理 解上下文语境)。在语境理解类题目中，过去进行时与一般过去时的区分及动作背景的描述往往是 解题关键。 考查内容 ·构成形式：肯定句（主语+was/were+-动词现在分词)、否定句（主语+was/were+not+动词现在分 词)、疑问句(Was/Were+主语+动词现在分词)的结构辨析 。时间标志词：when、while、at this time yesterday、fiom8tol0 last night等引导的时间状语与时态匹 配 ·语境应用：过去某一时刻正在进行的动作描述，及与一般过去时在包含when/while的复合句中的动 作对比（如一个动作正在进行时另一个动作突然发生） 知识点一：过去进行时的构成及用法 1.基本构成 l.肯定句：主语+was/were+动词-ing形式 ·第一人称/第三人称单数：I/He/She/It+was+V-ing ·例句：She was reading a book at8p.m.last night. 。第二人称/复数：You/We/They+were+V-ing ·例句：They were playing basketball when I arrived. 2.否定句：主语+was/were+not+动词-ing形式 。缩写形式：wasn't/weren't 。例句：He wasn't watching TV at that time. 初二下册北师大版 【语法专版】 Unit 6 Detectives 3.疑问句：Was/Were+主语+动词-ing形式？ ·例句：Were you listening to music just now? 2.核心用法 1.表示过去某一特定时间正在进行的动作 ·时间标志词：at8o'clock last night,this time yesterday,.when引导的时间状语从句等 。例句：I was doing my homework when my mother came back. 2.描述过去某段时间内持续进行的动作（未明确起止点） ●例句：They were building a new school last summer. 3.与一般过去时的区别 1.过去进行时：强调动作在过去某时刻”正在进行”（持续性） ●例句：She was cooking dinner at7p.m.(7点时正在做饭) 2.一般过去时：强调动作在过去”已完成”（短暂性或完整事件） 。例句：She cooked dinner at7pm.(7点做了饭，已完成) 4.常见时间状语搭配 1.明确时间点：at9:30 yesterday morning,from8tol0 last night 2.时间状语从句：when+一般过去时句子（主句用过去进行时） ●例句：The phone rang while I was taking a shower. 知识点二：过去进行时的核心用法与语境应用 1.基本概念（过去某特定时刻/时间段正在进行的动作) 1.核心特征：强调动作在过去某一具体时间点或时间段内“正在进行”，常与另一过去动作或时间点 对比 2.时间标志场景 ·明确时间点：at9o'clock last night(昨晚9点)、his time yesterday(昨天这个时候) ·时间状语从句：whn引导的一般过去时句子（主句用过去进行时，从句用一般过去时） 。时间段描述：from8tol0 last morning(昨天上午8点到10点) 2.主动语态结构与用法 2 初二下册北师大版 【语法专版】 Unit 6 Detectives 1.肯定句结构：主语+was/were+现在分词(doing) ·三单/单数主语：He was writing a report at 10p.m.last night.(昨晚l0点他正在写报告) 。复数主语：They were having a meeting when the fire alarm rang.(火警响时他们正在开会) 2.否定句结构：主语+wasn't/weren't+现在分词 。She wasn't listening to music this time yesterday.(昨天这个时候她没在听音乐) 3.疑问句结构：Was/Were+主语+现在分词？ ·Were you watching TV when your parents came back?(父母▣来时你在看电视吗？) 3.被动语态结构与转换 I.结构：主语+was/were being+过去分词 。主动句：The workers were repairing the road last week.(工人们上周在修路) ·被动句：The road was being repaired by the workers last week.(这条路上周正在被工人们维修) 2.特殊注意：不及物动词无被动语态（如happen,sleep等） 4.语境应用(Detectives单元高频场景) l.案件描述：The suspect was breaking into the shop when the police arrived..(警察到达时嫌疑人正在闯 入商店) 2.证人陈述：I was walking past the bank at7:30a.m.and saw a black car.(早上7：30我正路过银行，看 到一辆黑色轿车) 3.时间对比：While Tom was investigating the scene,his partner was interviewing witnesses.(汤姆勘察现 场时，他的搭档正在询问证人) 5.与一般过去时的区别 l.过去进行时：强调动作“正在进行”的过程(When I called him,he was having dinner.我打电话时他 正在吃饭一饭没吃完) 2.一般过去时：强调动作“已完成”(He had dinner at7p.m.他晚上7点吃的饭一动作已结束) 知识点三：过去进行时 1.基本结构 1.肯定句：主语+was/were+动词-ing形式 ·例句：She was reading a book at8p.m.last night. 3 初二下册北师大版 【语法专版】 Unit 6 Detectives 2.否定句：主语+wasn't/weren't+动词-ing形式 ·例句：They weren't playing football when I arrived.. 3.疑问句：Was/Were+主语+动词-ing形式？ 。例句：Was he watching TV at this time yesterday? 2.核心用法（中考必背) 1.表示过去某一时刻正在进行的动作（常与具体时间点连用） ·时间标志词：at8o'clock last night,this time yesterday,when引导的时间状语从句 ●例句：I was doing my homework when my mother came back 2.表示过去某段时间内持续进行的动作（常与时间段连用) 。时间标志词：from7to9 last evening,all morning yesterday ·例句：They were playing basketball from4to5p.m.yesterday afternoon, 3.描述两个过去同时进行的动作（用while连接，主从句均用过去进行时） ●例句：While Tom was reading,his sister was listening to music. 3.常见易错点（中考高频考点） 1.when与while的区别： ·whn引导的从句可接短暂性动词或延续性动词，主句用过去进行时/一般过去时 ·例句：When the rain started,we were having a picnic.(从句短暂性动词，主句延续性动作) 。while引导的从句接延续性动词，主从句均用过去进行时或“主从过去进行时+一般过去时” 。例句：While she was cooking,the phone rang.(从句延续性动词，主句短暂性动作) 2.短暂性动词不可用于过去进行时（如come,go,stat,finish等） 。错误：He was coming to the party at7p.m. 。正确：He came to the party at 7 p.m. 3.过去进行时与一般过去时的对比： ·过去进行时强调动作“正在进行”，一般过去时强调动作“已完成” ·例句：She was writing a letter last night.(昨晚一直在写信，可能未写完) ·例句：She wrote a letter last night.(昨晚写了一封信，已完成) 解题小妙招 4 初二下册北师大版 【语法专版】 Unit 6 Detectives 过去进行时妙招 过去进行看标志，at+点while/when常出现： 肯定结构'was/were+V-ing',否定not加在be后边： 疑问be动词放句首，主谓一致记心间： 单数主语用was,复数主语were来伴： 持续动作用进行，短暂动作用一般： while主从同进行，两个进行时态现： 被动结构'was/were being done'”,by引出动作源。 考法精析 考法一：构成及基本用法 核心：掌握过去进行时肯定句、否定句、疑问句的构成，正确使用was/were搭配主语 真题1（语法填空)： She(read)a storybook at 9 o'clock last night. 答案：was reading 解析：由时间标志词“at9o'clock last night”可知用过去进行时：主语She为第三人称单数，be动 词用was,Iead的-ing形式为reading。 真题2（单项选择)： They-playing basketball when the rain started. A.was B.were C.are D.is 答案：B 解析：主语They为复数，过去进行时中be动词用were,构成“were playing”表示过去某时正在进 行的动作。 考法二：句式转换与情景应用 核心：结合具体语境进行过去进行时的句式转换（肯定句、否定句、疑问句）及主谓一致纠错 真题1（句式转换）： 原句：They were playing football on the playground at4p.m.yesterday. (1)否定句：Theyplaying football on the playground at4p.m.yesterday.. (2)一般疑间句：_they playing football on the playground at4p.m.yesterday? 答案：(I)weren't(2)Were 解析：否定句直接在were后加not(缩写为weren't):疑问句将were提到主语前，动词-ing形式保 持不变。 初二下册北师大版 【语法专版】 Unit 6 Detectives 真题2（句子改错)： While my parents was cooking dinner,I was doing my homework. 答案：was→were 解析：主语my parents为复数，过去进行时中be动词应使用were,主谓一致需匹配主语单复数。 考法三：过去进行时与一般过去时的综合辨析及被动语态转换 核心：结合语境区分过去进行时（强调动作正在进行）与一般过去时（强调动作已完成），掌握主 动变被动的结构转换(was/were being+过去分词) 真题1（单项选择)： ITV when my father came back last night.He-a gift for me. A watched:brought B was watching:brought C watched:was bringing D was watching:was bringing 答案：B 解析：第一空由“when my father came back”可知，主句动作在过去某时刻正在进行，用过去进行 时“was watching”;第二空“brought”强调过去已完成的动作，用一般过去时。 真题2（语法填空)： The workers_(build)a bridge last winter.At this time last month,the bridge(build)by them 答案：built;was being built 解析：第一空由“last winter”可知用一般过去时，build的过去式为built:第二空由“at this time last month”和动作承受者“the bridge”可知，用过去进行时被动语态，结构为“was being+过去分词”， build的过去分词为built。 真题演练 演练一：单项选择（共10题） 1.My fathera newspaper when I got home yesterday. A.reads B.read C.was reading D.is reading 2.Theybasketball on the playground this time last Sunday. A.was playing B.were playing C.played D.are playing 3.While TomTV,his sister her homework. A.watched,did B.was watching;did C.watched;was doing D.was watching;was doing 4.-you to music at 9 p.m.last night? —Yes,Iwas. A.Do;listen B.Did;listen C.Were;listening D.Are;listening 6 初二下册北师大版 【语法专版】 Unit 6 Detectives 5.The phone rang while shedinner. A.cooks B.cooked C.is cooking D.was cooking 6.HeTV at 8 o'clock yesterday evening.He was reading a book. A.wasn't watching B.didn't watch C.isn't watching D.doesn't watch 7.When the teacher into the classroom,the students loudly. A.came;talked B.came;were talking C.was coming;talked D.was coming;were talking 8.A new bridgeby workers last month. A.built B.was built C.was being built D.is being built 9.Shethree letters and then went shopping yesterday. A.writes B.wrote C.was writing D.is writing 10.My parentsin the garden when it suddenly rained. A.worked B.were working C.are working D.work 演练二：填空试题（共10题） 1.She(play)the piano at 7 p.m.last night. 2.They-(not study)when I called them yesterday. 3.While I(walk)to school,I met my old friend. he(read)a storybook at this time yesterday? 4.The workers_(build)a house last summer. 5.My brother(not watch)TV then;he was doing homework. 6.When the storm_(come),we_(have)dinner. 7.She(cook)when the doorbell rang. 8.The students(clean)the classroom when the teacher arrived. 9.We(play)games in the park when it started to rain. 演练三：语法填空（共10空） Last night,something interesting happened to my family.At 8 p.m.,my mom_(make)dinner in the kitchen,and my dad_(read)a newspaper in the living room.My sister and I_(do)our homework in our room.Suddenly,the lights_(go)out.We-(not see)anything,so we shouted,"What's happening?" While we(wait)for the electricity,my dad(try)to find a flashlight.He(look)in the drawer when he_(find)some candles.Just then,the lights came back on.We all laughed-my mom's soup _(boil) over,and my sister's pencil(fall)on the floor! 7 初二下册北师大版 【语法专版】 Unit 6 Detectives 答案区 演练-：1.C2.B3D4.C5D6.A7B8.C9B10B 演练二：1.was playing2.weren't studying3.was walking4.Was,reading5.were building 6.wasn't watching 7.came;were having 8.was cooking 9.were cleaning 10.were playing 演练三：l.was making2.was reading3.were doing4.went5.couldn't see/weren't seeing 6.were waiting 7.was trying 8.was looking 9.found 10.was boiling;fell