Unit 4语法讲义：时间状语从句 2023-2024学年牛津译林版九年级英语上册

9A Unit 4语法讲义（时间状语从句） 一、状语从句的概念 在主从复合句中作状语的句子被称为状语从句。 二、状语从句的种类 种类 引导词 ★词义 (9AU4)时间状语从句 before 在...之前 after 在...之后 when 当...的时候 while 当...的时候 since 自...以来 till/until 直到...为止 not...until... 直到...才... as soon as 一...就... whenever 每当；无论何时 (9AU5)原因状语从句 because 因为 since as (9AU6)条件状语从句 if 如果 unless 除非 (9AU7)让步状语从句 (al)though 尽管 (9AU7)结果状语从句 so...that... 如此...以至于... such...that... (9AU7)目的状语从句 so that 以便，为使 三、时间状语从句 1、before引导的时间状语从句 before “在...之前” 连词＋时间状从(主一过从一过) e.g. He remained there for about a year before the NBA took notice of him. 介词＋时间点/doing e.g. before 9 a.m. 2、after引导的时间状语从句 after “在...之后” 连词＋时间状从(主一过从一过) e.g. The sun came out after the storm stopped. 介词＋时间点/doing e.g. after lunch 3、when引导的时间状语从句 when “当...的时候” 连词＋时间状从(主短从长、主长从短、主短从短、主将从现) 长：现在/过去进行时，即谓v.是be＋doing 短：一般现在/过去时，即谓v.是原形、三单、过去式 e.g. The earthquake started when I was doing some cleaning the other day. e.g. Daniel was watching TV when the earthquake started. e.g. When he finally got the chance, he scored 20 points in his first game. e.g. She will show me some photos taken in Yunnan when she returns. “什么时候” 连词＋to do 什么时候做某事when to do sth. 4、while引导的时间状语从句 while “当...的时候” 连词＋时间状从(主短从长、主长从长) e.g. While the boys were playing football, it rained. e.g. Daniel was watching TV while his mother was washing the dishes. “而” 表对比 e.g.You like sports while I like reading. 注意：在[含有(when/while引导的)时间状语从句的]主从复合句中，若主句和从句的主语一致，且从句的谓v.是be动词，则可省略从句的主语和be动词，构成当做某事的时候when doing sth.结构 e.g. when (he was) attending junior high, Spud tried out for the school team. ( )1.A true friend can see the pain in your eyes ______ everyone else believes the smile on your face. A. while B.because C.before D.until ( )2.It is summer now in China, ______ it is winter in Australia. A. before B.until C.while D.since 5、since引导的时间状语从句 since “自...以来” （1）现在完成时/一般现在时+since+一般过去时 has been/ is... since...过去式 主句