when 引导时间状语从句-2025-2026学年七年级英语下册句型全解（北师大版）

初一下册北师大版 【寒假专版】A版句型全解 寒假专版 【A版句型全解】when引导时间状语从句 初中·北师大版·初一下册 基本结构 句型结构：when引导时间状语从句 whn意为“当…时候”，引导时间状语从句时，可表示主句动作和从句动作同时发生、先 后发生或从句动作发生时主句动作正在进行等；主句和从句的时态通常根据具体语境确定，若主 从句动作都发生在过去，且从句动作发生时主句动作正在进行，主句用过去进行时，从句用一般 过去时：若主从句动作几乎同时发生，主从句可都用一般过去时等。 例句展示： I was doing my homework when my mother came back.(当我妈妈回来的时候，我正在做作业) When I see him,I will tell him the news.(当我见到他时，我会告诉他这个消息) 句型精讲（核心考法） 考法1：when引导时间状语从句的时态搭配（中考高频考点） 判断规侧+例句对比 规则1：主句为一般过去时，从句常用过去进行时（强调主句动作发生时，从句动作正在进 行) 例句：I was reading a book when the doorbell rang. (主句rang为一般过去时，从句was reading为过去进行时) 规则2：主句为过去进行时，从句常用一般过去时（强调从句动作打断主句正在进行的动 作) 例句：When Tom was doing homework,his mother came back. (主句was doing为过去进行时，从句came为一般过去时) 规则3：主从句均为一般过去时（强调两个短动作先后或同时发生） 例句：When I got to school,the bell rang. (got和rang均为一般过去时) 初一下册北师大版 【寒假专版】A版句型全解 真题再现(2024北师大版七年级下册期末测试) TV when my father came home yesterday. A.watch B.watched C.was watching D.am watching 答案：C 解析：主句动作“看电视”在“爸爸回家”时正在进行，从句cae为一般过去时，主句用过 去进行时was watching。 (2023北京朝阳区期中) When the rain,we were playing basketball on the playground. A.start B.starts C.started D.will start 答案：C 解析：从句动作“下雨”打断主句“打篮球”，主句were playing为过去进行时，从句用一般 过去时started。 考法2：when引导时间状语从句与并列句的区分（易混点） 判断规则+例句对比 规则：whn引导时间状语从句时，句子只有一个主句：若句中无连词却出现两个谓语动词， 则为并列句，需用and连接（此时wen意为“这时/突然”，不引导从句） 例句1（状语从句）：When she heard the news,she cried.(一个主句，when为连词) 例句2（并列句）：She was walking home,and when she saw a dog.（错误，应为She was walking home when she saw a dog.She was walking home and saw a dog.) 正确并列句：I was sleeping,and suddenly the phone rang.(=I was sleeping when the phone rang.) 真题再现(2024北师大版七年级下册单元练习) 2 初一下册北师大版 【寒假专版】A版句型全解 He was listening to music he found his lost key. A.when B.and C.so D.but 答案：A 解析：句中“听音乐”和“找到钥匙”为时间关系，when引导时间状语从句，无需用and连 接并列句。 (2023山东青岛月考) I was reading a novel the light went out. A.so B.when C.because D.and 答案：B 解析：“灯熄灭”打断“读小说”，用when引导时间状语从句，而非and连接并列句。 考法3：when引导时间状语从句的省略（简洁表达) 转换规则+例句转换 规则：当从句主语与主句主语一致，且从句谓语含be动词时，可省略从句主语和be动词 (保留when+现在分词/过去分词) 1:When he was waiting for the bus,he saw an old man fall down. 省略后：When waiting for the bus,.he saw an old man fall down.(省略he was) 例句2：When the city is seen from the hill,it looks beautiful 省略后：When seen from the hill,the city looks beautiful.（省略the city is) 真题再现(2024北师大版七年级下册期末改编) When she_(walk)along the street,she met her teacher..(用所给词的适当形式填空) 答案：was walking 3 初一下册北师大版 【寒假专版】A版句型全解 解析：从句主语she与主句主语一致，但谓语无be动词，需补全was walking,不可省略 (完整句为When she was walking.)。 (2023江苏苏州期中) When_(ask)about his hobby,Tom said he liked playing football..(用所给词的适当形式填 空) 答案：asked 解析：从句主语Tom与主句主语一致，且从句完整形式为When he was asked.,可省略he was,保留asked。 考法4：when引导特殊疑问句（询问时间）与状语从句的区分 判断规侧+例句对比 规则1：when引导特殊疑问句时，后接一般疑问句语序（疑问词+be/助动词情态动词+主 语+谓语) 例句：When will you go to Beijing?(特殊疑问句，询问时间) 规则2：when引导状语从句时，后接陈述句语序（主语+谓语） 例句：Idon't know when he will go to Beijing.(宾语从句中嵌套when引导的陈述句语序) 真题再现(2024北师大版七年级下册同步练习) will you finish your homework? —In half an hour. A.What B.When C.Where D.How 答案：B 解析：答语“半小时后”表时间，用whn引导特殊疑问句，询问动作发生时间。 (2023浙江杭州期末) Can you tell me the party will start? 4 初一下册北师大版 【寒假专版】 A版句型全解 A.when B.what C.who D.where 答案：A 解析：空格后为陈述句语序(the party will start)，when引导宾语从句，询问“聚会何时开 始”，而非特殊疑问句。 句型综合训练 训练1：单项选择（考察when引导时间状语从句的时态搭配) 1.1 my homework when the telephone rang last night. A.do B.did C.was doing D.am doing 2.When Tom to school,it began to rain heavily. A.walk B.walks C.walked D.is walking 3.My mother dinner while my father was reading newspapers. A.cooks B.cooked C.was cooking D.is cooking 4.WhenI the door,I found a letter on the ground. A.open B.opened C.was opening D.am opening 5.Theybasketball on the playground when the bell rang A.play B.played 初一下册北师大版 【寒假专版】 A版句型全解 C.are playing D.were playing 6.When the teacher into the classroom,we were talking loudly. A.come B.comes C.came D.will come 7.I TV at 8 o'clock last night when my friend called me. A.watch B.watched C.was watching D.am watching 8.When the accident I was walking along the street. A.happen B.happens C.happened D.will happen 训练2：同义句转换（考察when引导时间状语从句的省略） 1.When she was walking in the park,she met her old friend. →When in the park,she met her old friend. 2.When the book is read carefully,you will understand the meaning. -When carefully,you will understand the meaning of the book. 3. When he was waiting for the train,he saw a strange man. -When for the train,he saw a strange man. 4.When the problem is discussed,we need to find a solution. -When,we need to find a solution to the problem. 5.When I was listening to music,I forgot the time. When to music,I forgot the time. 6.When the flowers are watered every day,they will grow well. -When every day,the flowers will grow well. 7.When he was driving home,he saw an accident. 6 初一下册北师大版 【寒假专版】 A版句型全解 →When home,he saw an accident. 8.When the report is written,it should be handed in on time. →When the report should be handed in on time. 训练3：完成句子（考察when引导时间状语从句的综合运用） 1.当我正在做饭时，突然停电了。 I (cook)when the electricity went out suddenly. 2.昨天下午五点钟，当我到达电影院时，电影已经开始了。 -When I(arrive)at the cinema at 5 o'clock yesterday afternoon,the movie had already started. 3.当她听到这个好消息时，她忍不住哭了。 -When she (hear)the good news,she couldn't help crying. 4.我正在路上散步，这时遇到了我的英语老师。 →I (walk)on the road when I met my English teacher. 5.当雨开始下的时候，我们正在开运动会。 →When the rain (start),we were having a sports meeting. 6.我哥哥正在房间里做作业，这时他的朋友打电话来了。 -My brother(do)his homework in his room when his friend called. 7.当我走进教室时，学生们正在讨论问题。 -When I(walk)into the classroom,the students were discussing the problem. 8.昨天晚上八点，当我正在看电视时，门铃响了。 I(watch)TV at 8 o'clock last night when the doorbell rang. 9.当他还是个孩子的时候，他经常在河里游泳。 When he(be)a child,he often swam in the river. 10.当妈妈回来的时候，我正在打扫我的房间。 →I (clean)my room when my mother came back. 训练4：写作高级句式（考察when引导时间状语从句的应用） 1.当我正在公园散步时，我看到一个小男孩在哭。（翻译） in the park,I saw a little boy crying. 7 初一下册北师大版 【寒假专版】 A版句型全解 2.昨天晚上，当我正在准备考试时，我的好朋友来看我了。（翻译） →Last night,.when I for the exam,my good friend came to see me. 3.当雨停了之后，我们继续我们的旅行。（翻译） →When the rain we continued our trip 4. 当她听到这个坏消息时，她的眼睛里充满了泪水。（翻译） When she heard the bad news,her eyes. tears. 5.当我到达学校时，发现我把作业忘在家里了。（翻译） →When I school,I found I had left my homework at home. 6.当我们正在吃晚饭时，电话铃响了。（翻译） →When we dinner,the telephone rang. 参考答案 1.训练1：单项选择 1.C2.C3.C4.B5.D6.C7.C8.C II.训练2：同义句转换 1.walking 2.read 3.waiting 4.discussed 5.listening 6.watered 7.driving 8. written 工训练3：完成句子 1.was cooking 2.arrived 3.heard 4.was walking 5.started 6.was doing 7.walked 8.was watching 9.was 10.was cleaning V.训练4：写作高级句式 1.When;was;walking 2.was;preparing 3.stopped falling 4.were;filled with arrived;at 6.were;having