10.3 状语从句-【一战成名新中考】2024贵州中考英语·教材精讲练(贵阳、黔南专用)（人教版）

教材精讲练·贵州英语 第 二 部 分 语 法 专 题 精 讲 练 命题点 3　 状语从句 (3 年 3 考:2023. 2,2021. 51,2023 省一模 47 题;涉及题型:完形第一节、句子翻译、语法填空) 考点精讲 考向 1　 引导词 1. 引导时间状语从句的连词(短语) 连词(短语) 含义 用法 例句 while 当……时 when 当……时 具体用法和例句见本表后面的“何时用 when,何时用 while 的判定方法”。 until / till 直到 until 和 till 通常可以换用,但是 till 不 用于句首;“ not􀆺until / till”意为“直 到……才……”。 You may stay here until the snow stops. She didn􀆳t go to bed until she had finished her homework. before 在……之前 主句的动作发生在从句动作之前。 Did she leave a message before she left? after 在……之后 主句的动作发生在从句动作之后。 Molly showed me lots of beautiful pictures after I got to her home. since 自从 从句用一般过去时,主句常用现在完 成时。 I have worked in this company since I came to this city. as soon as 一…… 就…… 从句动作一发生,主句的动作随即发 生,若从句用一般现在时,主句常用 一般将来时。 I will visit you as soon as I come back. 何时用 when,何时用 while 的判定方法: (1)若主句的动词是短暂性动词,从句的动词是延续性动词,则 when 和 while 都可用。 如: Our teacher came into the classroom when / while we were chatting. (2)若主句和从句表示两个同时进行的持续性动作,则要用 while。 如: My mother was cooking dinner while I was reading a book. (3)若从句的动词是短暂性动词,则要用 when。 如: It was raining when she arrived at the station. (4)若主句和从句的动作不是同时发生,而是有先后顺序,则要用 when。 如: I will study abroad when I have enough money. (5)when 可作并列连词,意为“这时(突然)”,while 也可作并列连词,意为“而,却”。 如: He was ready to leave home when the phone rang. I like watching action movies while she likes watching comedies. 921 教材精讲练·贵州英语 第 二 部 分 语 法 专 题 精 讲 练 2. 引导条件状语从句的从属连词(短语) 连词 含义 用法 例句 if(2023. 2,2023 省一模 47 题) 如果 若从句用一般现在时,主句常 用一般将来时。 If it doesn􀆳t rain, I will go on a picnic with my friends. unless 除非 unless 可以转化为“ if􀆺not􀆺” 结构。 主从句时态与 if 的用法 一致。 You will be late for school unless you go now. = You will be late for school if you don􀆳t go now. as long as 只要 主从句时态与 if 的用法一致。 I􀆳ll stay as long as you need me. 3. 引导原因状语从句的从属连词 连词 含义 用法 例句 because 因为 表示因果关系的语气最强,用来回答 why 引导的问句,所引出的原因通常是听 话人不知道或最感兴趣的。 I can􀆳t go shopping with you because I have to look after my little sister. since 因为;既然 表示因果关系的语气比 because 弱,引出 的原因通常是人们已知的事实,因此经 常译为“既然”。 Since everyone is here, let􀆳s begin. as