when 引导的时间状语从句-2025-2026学年八年级英语上册句型全解（人教版）

初二上册人教版 【寒假专版】A版句型全解 寒假专版 【A版句型全解】when引导的时间状语从 句 初中·人教版·初二上册 基本结构 句型结构：when引导的时间状语从句 wh意为”当…时候”，引导时间状语从句时，主句和从句的动作可以同时发生，也可以有 先后顺序；若主句用一般将来时，从句常用一般现在时表将来（主将从现)；当when引导的从句 位于句首时，需用逗号与主句隔开。 例句展示： I was reading a book when my mother came in..(当我妈妈进来的时候，我正在看书) I will call you when I arrive at the station.(当我到达车站时，我会给你打电话) 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） 主将从现规则+例句对比 规则：主句用一般将来时(wil+动词原形)，从句用一般现在时（主语三单动词加ss,其他用原形） 例句l:I will call you when I arrive home..(我到家时会给你打电话) 主句(I will call you)一般将来时，从句(I arrive home)一般现在时 例句2：She will start cooking when her mother comes back.(她妈妈回来时她会开始做饭) 主句(She will start cooking)一般将来时，从句(her mother comes back)一般现在时（主语三单动 词加s) 真题再现(2024人教版初二上册期末测试) TV when my father gets home this evening. A.watch 初二上册人教版 【寒假专版】A版句型全解 B.will watch C.watched D.am watching 答案：B 解析：主句表将来动作，用will watch,从句(my father gets home)一般现在时符合主将从 现 考法2：when引导时间状语从句与主句动作的先后关系 同时发生/先后发生判断+例句解析 规则1：主从句动作同时发生，常用进行时态（主句过去进行时，从句一般过去时） 例句：I was reading a book when the phone rang.(电话铃响时我正在看书) rang(一般过去时)和was reading(过去进行时)同时发生 规则2：从句动作先于主句发生，常用一般时态（主过从过） 例句：When she finished her homework,she went to bed.（她完成作业后就去睡觉了) finished(先发生)和went(后发生)均为一般过去时 真题再现(2023人教版初二上册同步练习) He breakfast when his brother into the kitchen. A.had;came B.was having;came C.had;was coming D.was having;was coming 答案：B 解析：when引导的从句用一般过去时(came),主句用过去进行时(was having)表同时发 生 考法3：when引导的时间状语从句与简单句的转换 转换规则+例句转换 规则：when引导的时间状语从句（主从主语一致）可转换为”when+现在分词”结构作时间 状语 例句l:原句When I walk in the park,I always meet my neighbors. 2 初二上册人教版 【寒假专版】A版句型全解 转换句：When walking in the park,I always meet my neighbors. 例句2：原句When she listens to music,.she feels relaxed. 转换句：When listening to music,she feels relaxed. 真题再现(2024人教版初二上册单元测试) When he (read)English,.he likes to read aloud.(用所给词的适当形式填空) 答案：reads 解析：when引导时间状语从句，主语he为三单，动词用reads 考法4：when引导时间状语从句的省略现象 省略规则+例句对比 规则：当主从句主语一致且从句含be动词时，可省略从句主语和be动词 例句l:原句When he was a child,.he lived in the countryside. 省略句：When a child,he lived in the countryside.(省略he was) 例句2：原句When she is free,she often goes shopping. 省略句：When free,she often goes shopping..(省略she is) 真题再现(2023人教版初二上册期中测试) When (be)young,.my father worked in a factory.(用所给词的适当形式填空) 答案：was 解析：从句省略了主语my father,be动词用was符合过去时态 考法5：when与while/as的用法区别 用法对比规则+例句辨析 规则l:when可接延续性/非延续性动词，while/.as只接延续性动词 例句：When/While/As I was studying,the lights went out..(我学习时灯灭了)(studying延续性动词， 三者均可) When the rain stopped,we went out..(雨停后我们出去了)(stopped非延续性动词，只能用when) 规则2：while强调主从句动作同时进行，常用进行时态对比 例句：While I was doing homework,my sister was watching TV.(我做作业时我妹妹在看电视) 3 初二上册人教版 【寒假专版】A版句型全解 真题再现(2024人教版初二上册期末测试) I was cooking my brother was listening to music. A.when B.while C.as soon as D.until 答案：B 解析：主从句均为过去进行时(was cooking/was listening),强调同时进行用while 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核心考法） 1.I you a message when I reach the airport tomorrow. A.send B.will send C.sent D.am sending 2.She TV when the doorbell rang last night. A.watches B.will watch C.was watching D.watched 3.When I in the garden,I found a beautiful butterfly. A.work B.worked C.am working D.was working 4. my mother was cooking,my father was reading newspapers. A.When B.While C.As soon as D.Until 初二上册人教版 【寒假专版】A版句型全解 5.He to bed after he finished his homework yesterday. A.goes B.will go C.went D.is going 6.When English,she always pays attention to pronunciation. A.study B.studies C.studying D.studied 7.They_ a walk when it started to rain. A.take B.took C.are taking D.were taking 训练2：同义句转换（考察when引导的时间状语从句与简单句的转换） 1. When I do exercise,I feel energetic. Whenexercise,I feel energetic. 2.When she reads books,she forgets the time. →When books,she forgets the time. 3.When we travel to foreign countries,we should learn about local customs. When to foreign countries,we should learn about local customs. 4.When he listens to the teacher,he takes notes carefully. -When to the teacher,he takes notes carefully. 5.When they play basketball,they always help each other. When basketball,they always help each other. 训练3：完成句子（考察when引导时间状语从句的时态及用法） 1.我明天一到北京就给你打电话。 →I you when I arrive in Beijing tomorrow. 2.昨天晚上我正在写作业，这时我的朋友来了。 →I my homework when my friend came last night. 5 初二上册人教版 【寒假专版】A版句型全解 3.当她还是个小女孩的时候，她就喜欢画画。 →When she a little girl,she liked drawing. 4.雨停了我们再出去。 →We out when the rain stops. 5.当我爸爸下班回家时，我妈妈通常在做饭。 -My mother is usually cooking when my father home from work. 训练4：写作高级句式（考察when引导时间状语从句的应用） 1.当我遇到困难时，我的老师总是鼓励我不要放弃。 →When I difficulties,my teacher always encourages me not to give up. 2.他正在听音乐，这时电话响了。 →He to music when the phone rang. 3.当我们在公园里散步时，我们看到了许多美丽的花。 →When in the park,we saw many beautiful flowers. 参考答案 1.训练1：单项选择 1.B2.C3.B4.B5.C6.C7.D Ⅱ.训练2：同义句转换 1.doing 2.reading 3.traveling 4.listening 5.playing Ⅱ.训练3：完成句子 1.will call 2.was doing 3.was 4.will go 5.gets V.训练4：写作高级句式 1.meet 2.was listening 3.walking 6