时间状语从句when while as soon as until-2025-2026学年八年级英语下册语法考点精讲（教科版五四制）

8下外研版（五四制） 【寒假专版】 B版考点精讲 寒假专版 时间状语从句：when,while,as soon as,. until 语法专项突破 考点精讲 考点一：when的基本用法 规则：whn引导时间状语从句时，既可以表示主句动作和从句动作同时发生，也可表示从句动 作先于主句动作发生，从句中可用一般过去时等时态。 例题l:(选择，外研七下期末真题改编)：I was reading a book_my mother came in.A.when B. while C.as soon as D.until (答案：A) 例题2：（填空）：_he finished his homework,he went out to play. (答案：When) 考点二：while的用法 规则：whil©引导时间状语从句时，强调主句动作和从句动作同时进行，从句常用进行时态。 例题1：（选择，外研八上期末真题改编）：_I was watching TV,my brother was listening to music. A.When B.While C.As soon as D.Until (答案：B) 例题2： (填空)：She was cooking_her husband was cleaning the room. (答案：while2) 考点三：as soon as的用法 规则： as soon as表示“一…就…”，引导时间状语从句时，遵循“主将从现”原则，即主句 用一般将来时，从句用一般现在时：若主从句都表示过去的动作，主从句都用一般过去时。 例题l:(选择，外研七下期末真题改编)：I一you as soon as I arrive in Beijing..A.call B.called C.will call D.am calling (答案：C) 例题2： (填空)：He ran to her.一he saw her. (答案：as soon as) 考点四：until的用法 规则：utl表示“直到…为止”，引导时间状语从句时，若主句为肯定句，主句谓语动词用延 续性动词：若主句为否定句(not..until..),表示“直到…才…”，主句谓语动词用非延续性动 词。 8下外研版（五四制） 【寒假专版】 B版考点精讲 例题1： (选择，外研八上期末真题改编)：I will wait for you一you come back.A.when B.while C.as soon as D.until (答案：D) 例题2： (填空)：He didn't go to bed_he finished his work. (答案：until) 考点五：when与while的区别 规则：when引导的从句动作可以是短暂性的，也可以是延续性的：wile引导的从句动作必须是 延续性的，且常与进行时态连用。 例题1： (选择，外研八上期末真题改编)：一the teacher came in,we were talking.A.When B, While C.As soon as D.Until (答案：A) 例题2： 考点综合训练 一、 单项选择 1.I was doing my homework the phone rang. A.when B.while C.as soon as D.until 2.-my father was reading a newspaper,my mother was cooking dinner. A.When B.While C.as soon as D.Until 3.She to the park as soon as she finishes her homework. A.go B.goes C.will go D.went 4.He didn't leave the officehe finished all the work A.when B.while C.as soon as D.until 5.-the rain stopped,we started to play outside. A.When B.While C.as soon as D.until 二、语法填空 1.(when/while)I was walking home,I met an old friend. 2.Please call me_(as soon as/until)you arrive at the station. 3.He will wait for you(until/when)you come back 4.-(When/While)she opened the door,the cat ran out. 5.They were playing basketball_(while/when)it began to rain 三、句型转换 2 8下外研版（五四制） 【寒假专版】 B版考点精讲 1.I will tell him the news as soon as he comes back.(改为一般过去时) Ihim the news as soon as heback. 2.She was watching TV when her brother came in.(用while改写) -she was watching TV,her brotherin. 3.He didn't go to bed until his parents came home.(改为肯定句) He_in bed_his parents came home. 四、篇章填空 My brother and I have different habits.I usually read books-1 my parents watch TV in the evening. Last Sunday,I was doing my homework2 my brother came into my room.He said he wanted to play games with me.I told him I would play with him3 I finished my homework.He waited quietly4I worked.5 I finished,we went to the park and had a great time. 参考答案 一、单项选择 1.A2.B3.C4.D5.A 二、语法填空 1.While 2.as soon as 3.until 4.When 5.when 三、句型转换 1.told;came 2.While;came 3.stayed until 四、篇章填空 1.while 2.when 3.as soon as 4.until 5.When 3