时间状语从句-2025-2026学年七年级英语下册语法知识点全解（沪教牛津版）

初一下沪教牛津版 【寒假专版】 A版知识点全解 寒假专版 【专题】时间状语从句 语法专项突破 考频分析 初一下沪教牛津版中，时间状语从句是基础语法模块，考频占句法总量的15%左右，主要出现在 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)。在语境理解类题目中，时 间状语从句的连接词选用及主从句时态呼应往往是解题关键。 考查内容 。引导词辨析：when、while、as、before、after、since、until、as soon as等引导词的含义与用法区别 。时态呼应：主从句时态的搭配规则（如“主将从现”原则在时间状语从句中的应用） ·语境理解：结合具体语境选择合适的引导词及判断从句时态，理解时间关系在句子中的表达 知识点一：时间状语从句的引导词及用法 1.常用引导词及含义 。when(当…时)、while（当…时，期间)、as（当…时，一边…一边)、before(在…之 前)、after(在…之后)、until/till(直到…)、since(自从…)、as soon as(一…就) ·例句： I.I was reading when he came in.(when引导，主句过去进行时，从句一般过去时) 2.She has lived here since20l0.(since引导，主句现在完成时，从句一般过去时) 2.时态搭配规则 ·主将从现（主句将来时，从句一般现在时)：I will call you as soon as I arrive. 。主过从过（主句过去时，从句相应过去时态）：He was doing homework while his mother was cooking. ·主现从现（主句一般现在时，从句一般现在时）：I get up early every day before the sun rises. 3.特殊引导词用法 1 初一下沪教牛津版 【寒假专版】A版知识点全解 。until/till:肯定句中主句动词为延续性动词，否定句中为短暂性动词 I.She waited until he came back.(wait为延续性动词) 2.He didn't leave until the rain stopped.(leave为短暂性动词) ·while:引导时间状语从句时，从句动词通常为延续性动词且常用进行时 L.They were playing basketball while I was studying.(主从句均为过去进行时) 知识点二：引导词及用法分类 1.时间连接词（引导时间状语从句) 1.表示“当…时” ●when（主从句动作可同时发生或先后发生，从句动词可延续或非延续) 例句：When I get home,I will call you. ·while（主从句动作同时进行，从句动词需为延续性动词) 例句：While she was reading,the doorbell rang. 。s(强调“一边…一边”，主从句动作同时发生) 例句：She sang as she walked.. 2.表示“在…之前/之后” 。before(在…之前) 例句：Finish your homework before you watch TV,. ●after(在…之后) 例句：I went to bed after I finished my homework. 3.表示“直到…” ·uti/till（直到…为止，主句为肯定句时谓语动词用延续性动词；主句为否定句时表示“直到 …才”，谓语动词用非延续性动词) 例句：He waited until she came back, She didn't leave until the rain stopped. 4.表示“一…就…” ●as soon as(主句用一般将来时，从句用一般现在时表将来) 例句：I will tell him as soon as he arrives. 5.表示“当…时候；在…期间” ·during(为介词，后接名词或名词短语，不能接句子) 例句：He fell asleep during the movie.. 2 初一下沪教牛津版 【寒假专版】 A版知识点全解 2.条件连接词（引导条件状语从句) 1.f（如果，主句用一般将来时，从句用一般现在时表将来；主句含有情态动词或为祈使句时，从句 也用一般现在时) 例句：If it rains tomorrow,we will stay at home. You can pass the exam if you study hard. 2.unless(除非，如果不，相当于if...not) You will fail unless you work hard.You will fail if you don't work hard. 3.原因连接词（引导原因状语从句) l.because(因为，回答why提出的问题，语气最强，不能与so连用) 例句：He didn't go to school because he was ill.. 2.since(既然，由于，通常放在句首，语气比because弱) 例句：Since you are free,.you can help me with my English. 3.as(因为，由于，语气比since还弱，多位于句首) 例句：As it was late,we decided to go home. 知识点三：时间状语从句 1.引导词when（当时) 1.表示主从句动作同时发生→例句：I was reading a book when my mother came in. 2.表示一个动作正在进行时另一个动作突然发生→例句：When the bell rang,we were having a class.. 3.用于一般过去时，描述过去某个时间点的动作→例句：She called me when she arrived home. 2.引导词while（当…期间/然而) L.强调主从句动作同时持续进行（主从句均用进行时）→例句：While I was doing homework,my brother was watching TV. 2.表示对比关系（然而）→例句：Some people like sports,.while others prefer music.. 3.引导时间状语从句时可与when互换（主从句动作无持续对比）→例句：While/When I walked into the room,everyone stopped talking. 3.引导词until/till（直到…为止) L.肯定句：主句动作持续到从句动作发生→例句：I will wait until you come back. 2.否定句(not...until):主句动作直到从句动作发生才开始→例句：He didn't go to bed until he finished his work. 3 初一下沪教牛津版 【寒假专版】 A版知识点全解 3.till与until用法相同，till不用于句首→例句：Until the rain stopped,we stayed at home.. 4.引导词before/after（在…之前/之后) 1.before:主句动作发生在从句动作之前→例句：Wash your hands before you eat meals. 2.after:主句动作发生在从句动作之后→例句：After she finished her homework,she went out to play. 3.主从句时态搭配：主过从过，主将从现→例句：I will call you before I leave.(主将从现)；She left after he arrived.(主过从过) 5.☑引导词ass00nas(一…就…) L.主从句时态遵循“主将从现”原则→例句：I will tell him the news as soon as he comes back. 2.主句用过去时，从句也用过去时→例句：As soon as the bell rang,the students ran out of the classroom. 3.表示两个动作紧密衔接，无时间间隔→例句：He started to cook as soon as he got home. 考法精析 考法一：引导词词义辨析 核心：根据语境判断时间状语从句中动作发生的时间点/时间段及主从句动作关系，选择正确引导 词 真题1（单项选择)： -I was walking home,I met an old friend. A.When B.While C.As D.Before 答案：B解析：从句动作“walking”为延续性动词且表示时间段，主从句动作同时进行，符合 wile引导时间段且从句常用延续性动词的用法，故选B。 真题2（语法填空）： He didn't go to bed he finished his homework last night. 答案：until解析：由“didn't go to bed”(短暂性动词否定式)和“finished his homework”可知， 此处表示“直到完成作业才睡觉”，符合“not...until..”结构，故填until。. 考法二：引导词辨析与时态搭配 核心：根据语境判断时间状语从句引导词，并结合引导词特点及时态规则选择正确动词形式 真题1（语法填空）： I was listening to musicmy brother came home.(when/while) 答案：when解析：从句动词”came”为短暂性动词，when既可接短暂性也可接延续性动词，此处 表示”当哥哥回家时我正在听音乐”，主句用过去进行时，从句用一般过去时，符合when引导时间 点的用法；while引导从句时常用延续性动词且多为进行时，故填when。 真题2（单项选择）： 初一下沪教牛津版 【寒假专版】A版知识点全解 She(not leave)until her mother(return)tomorrow. A.won't leave;will return B.doesn't leave;returns C.won't leave;returns D.didn't leave;returned 答案：C解析：由时间状语”tomorrow”可知主句用一般将来时，until引导时间状语从句遵循”主 将从现”规则，主句为否定句用won't leave'”,从句用一般现在时”returns',构成”not...until..”结构 表示”直到妈妈回来她才会离开”，故选C。 考法三：时间状语从句引导词辨析及时态搭配综合应用 核心：结合语境区分when/while/as的用法差异，掌握主现从不限、主过从必过、主将从现等时态规 则 真题1（单项选择）： I was doing my homeworkmy mother was cooking in the kitchen. A when B while C as D after 答案：B解析：主从句均为过去进行时，表示两个延续性动作同时进行，应用while引导时间状 语从句。 真题2（语法填空)： She(not leave)until her father came back last night. 答案：didn't leave解析：根据时间状语从句'until her father came back”及”last night'”可知，此处 为过去时，leave为短暂性动词，应用not.until结构，否定形式为didn't leave。 解题小妙招 时间状语从句解题妙招 引导词选看动状，延续时间用while: 短暂时间when当先，主从同时也用as; not.until是否定，直到才发生记心； 时态搭配有规则，主将从现要牢记； 主句将来从现在，主过从过也常见： when搭配主过进，从句一般过去时； until主现从现用，主过从过也适应。 真题演练 演练一：单项选择（共10题） 1.I was reading a bookmy sister turned on the TV. A When B While C As D Before 5 初一下沪教牛津版 【寒假专版】A版知识点全解 2.he walked to school,he listened to music. A When B While C As D After 3.She will call youshe arrives at the station. A as soon as B until C since D before 4.They didn't start the meeting-everyone arrived. A when B while C until D as 5.My father was cookingmy mother was washing clothes. A when B while C as D since 6.I usually do my homework-dinner. A before B after C until D as soon as 7.He(not go)to bed until his father came back last night. A didn't go B won't go C doesn't go D wasn't going 8.the rain stopped,we went out to play. A When B While C As D Since 9.SheTV while her brotherhomework yesterday. A watched;did B was watching;did C watched;was doing D was watching;was doing 10.I will tell him the news he tomorrow. A when;will come B as soon as;comes C while;comes D until;will return 演练二：填空（共10题) 1.We can't leave _the teacher allows us. 2.He was listening to music his friend called him. 3.I got up this morning,it was already 7 o'clock. 4.She will wait for youyou come back. 5.They played games_they finished their homework. 6.The students ran out of the classroom-the bell rang. 7.I didn't know the truth he told me. 8.she was reading,her cat jumped on the desk. 9.Please wash your hands_you eat. 10.He has lived in this city 2015. 演练三：语法填空（共10空） 6 初一下沪教牛津版 【寒假专版】 A版知识点全解 Tom is a middle school student.Last Saturday,he planned to visit his grandparents.He got up early(1) the sun rose.After breakfast,he started to walk to the bus stop.-(2)he was walking,he saw an old man carrying a heavy bag.Tom helped him carry it(3)they reached the man's home.The old man thanked him many times.When Tom arrived at the bus stop,the bus(4)(just leave).He had to wait for the next one. At 10:00 a.m.,Tom finally got on the bus.-(5)the bus was moving,he read a storybook.Suddenly,he noticed a little girl crying.He asked her what happened.The girl said she couldn't find her mother.Tom stayed with her(6)the bus arrived at the next stop.There,they saw the girl's mother waiting anxiously. The mother was very grateful and said,"I(7)(not leave)here(8)I found my daughter." Tom arrived at his grandparents'home at noon.His grandmother was cooking lunch(9)he walked in. They were very happy to see him.Tom told them about his experience on the way.His grandfather said, "You did a good deed.Remember,helping others(10)(make)us happy." 答案区 演练-：1.A2.C3.A4.C5.B6.A7.A8.A9.D10.B 演练二：1.until2.when3.When4.until5.after6.as soon as7.until8.While9.before10.since 1.before 2.While/As 3.until 4.had just left 5.When/While/As 6.until 7.won't leave 8.until 9.when 10.makes 7