when while引导的时间状语从句-2025-2026学年八年级英语下册语法重难点精讲（人教版）

8下人教版 【语法专版】 when/while时间状语从句精讲 语法专版 【语法专题】when/while引导的时间状语 从句专项突破 初中人教版八年级下册 语法精讲 语法概述：when/while引导的时间状语从句=用来表示主句动作发生时间的句子，说明一个动作 正在进行或发生时另一个动作也在进行或发生，when常引导时间点或时间段，while强调动作同 时进行且多用进行时，在句中可放在主句前或后。 重难点讲解 重难点一：when与while引导时间状语从句时的基本用法区别讲解： whn引导的时间状语从句既可以表示一个时间点，也可以表示一段时间，从句中既可以用延续性 动词也可以用非延续性动词：while引导的时间状语从句通常表示一段时间，从句中一般用延续性 动词，且多用进行时态。 When I got home(时间点，非延续性动词)，my mother was cooking, While my mother was cooking(一段时间，延续性动词，进行时态)，I was doing my homework. 真题再现： 1.(2024湖北武汉期中，人教版)一What were you doing_the phone rang?一I was taking a shower. A.when B.while C.before D.after 答案：A解析：从句中rang是短暂性动词，强调电话铃响的那个时间点，用when引导。 2.(2023湖南长沙月考，人教版)we were walking in the park,.we saw a beautiful bird. A.When B.While C.As soon as D.Until 答案：B解析：从句中were walking是延续性动词的进行时态，表示一段时间内正在进行 的动作，用while引导。 8下人教版 【语法专版】 when/while时间状语从句精讲 重难点二：when与while引导时间状语从句时主从句时态的搭配讲解： whn引导时间状语从句时，主从句时态搭配灵活，若主句用一般过去时，从句可用一般过去时（表 示两个动作同时发生或先后紧接着发生)或过去进行时；while引导时间状语从句时，若主从句动 作同时进行，主从句常用过去进行时，且多强调对比关系。 When the teacher came in(一般过去时)，the students were talking(过去进行时). While Tom was reading(过去进行时)，Jim was writing(过去进行时) 真题再现： l.(2024广东广州期末，人教版)I_TV when my father came back last night A.watch B.watched C.was watching D.am watching 答案：C解析：whn引导时间状语从句，从句用一般过去时，主句表示过去某一时刻正在 进行的动作，用过去进行时。 2.(2023 四川成都期中，人教版)While my brother his homework,I the dishes.. A.did;washed B.was doing;was washing C.does;wash D.is doing;am washing 答案：B解析：while引导时间状语从句，主从句动作同时进行，都用过去进行时，体现对 比关系。 重难点三：when与while在省略句中的用法讲解： when和while引导时间状语从句时，若主从句主语一致，且从句中有be动词，可省略从句中的主 语和be动词，构成“when/while+现在分词/过去分词”的结构。 When (she was)walking in the street,she met an old friend. While (he was)reading,he fell asleep 真题再现： 1.(2024江苏南京月考，人教版)_listening to music,.I like to sing along A.When B.While C.As D.Since 答案：B解析：从句省略了主语和be动词，listening是现在分词，while可用于这种省略结 构，强调在听音乐的过程中。 2.(2023 浙江杭州期末，人教版)He hurt his leg_playing football, A.when B.while 8下人教版 【语法专版】 when/while时间状语从句精讲 C.as D.for 答案：B 解析：从句省略了主语和be动词，playing是现在分词，while表示“在…期间”， 符合语境。 易错点综合演练 I单项选择（直击重难点） 1.-What you when the rainstorm came? A.do;do B.did;do C.were;doing D.are;doing 2.While my brother TV,I my homework last night. A.watched;did B.was watching;did C.watched;was doing D.was watching;was doing 3.reading the book,she found some interesting stories. A.When B.While C.As D.Since 4.I met my old friend I was walking in the park yesterday. A.when B.while C.before D.after Ⅱ.用所给词的适当形式填空（强化句型结构） 1.When Tom(come)home yesterday,his sister(listen)to music. 2.While they (play)basketball,it suddenly (begin)to rain 3.She (read)a novel when the phone(ring)just now. (watch)TV,my father fell asleep on the sofa 3 8下人教版 【语法专版】 when/while时间状语从句精讲 m.短文填空（综合运用when与while) 用when或while填空，使短文完整通顺。 Last Sunday morning,I had a busy but interesting time.1.I was doing my homework,my little sister was playing with her toys.Suddenly,she started crying loudly.I stopped writing and went to see what happened.2.I entered her room,I found she had broken her favorite toy bear.I tried to comfort her. At that moment,my mother came back from shopping.3.she saw the broken toy,she smiled and said, "Don't worry.I can fix it."4.my mother was fixing the toy,I went back to finish my homework.We all felt happy in the end. V.连词成句（聚焦句型结构） 1.was,doing,what,you,when,the,bell,rang,(? 2.while,Lily,was,singing,Lucy,was,dancing,( 3.I,was,reading,a,book,when,my,father,came,in,(. 4.playing,while,soccer,he,hurt,his,leg,( V.按要求改写句子（巩固when与while用法） l.Tom was reading a book when his mother called him.(改为一般疑问句) 2.While she was walking,.she met an old friend..(改为同义句，用when) 3.They were playing games.The teacher came in.(用when合并句子) 4.He was listening to music.He fell asleep.(用while合并句子) 参考答案 I.单项选择：1.C2.D3.B4.B Ⅱ.用所给词的适当形式填空： 1.came;was listening 2.were playing;began 3.was reading;rang 4.While watching 4 8下人教版 【语法专版】when/while时间状语从句精讲 Ⅲ.短文填空： 1.While 2.When 3.When 4.While V.连词成句： 1.What were you doing when the bell rang? 2.While Lily was singing,Lucy was dancing 3.I was reading a book when my father came in 4.While playing soccer,he hurt his leg. V.按要求改写句子： 1.Was Tom reading a book when his mother called him? 2.When she was walking,she met an old friend. 3.When the teacher came in,they were playing games. 4.While he was listening to music,he fell asleep