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1、可编辑初中英语状语从句知识点：时间状语从句连词主要有：when as while before after until as soon as since等1区分when, as, while的用法.when当.时候引导的时间状语从句，其动词既可以是持续性动作的动词，也可以是瞬间性动作的动词,如：_ the students heard the teachers footsteps, they all stopped talking.当学生们听到教师的脚步声时，他们都停顿了讲话。从句动作发生在前 as当.时候或一边.一边引导的时间状语从句其动词的动作是持续性的，而且侧重表示主句和从句的动作并相发
2、生：We were having breakfast _ she was combing her hair.她梳头时我们在吃早饭。 while表示在某一段时间里或在期间，其所引导的从句的动作是持续性的，并侧重表示和主句的动作同时发生。如：I can learn _ I work.我可以边工作边学习。用when, as, while填空：_ you came in, I was talking with a few boys.It started to rain _ we were playing outdoors.They talked _ they walked down the river
3、._ it was raining, the students were playing basketball.Her brother watched TV_ he ate supper.(4) before引导的时间状语从句，指时间上的在之前Ill be back _.你离开之前我就会回来。(5) as soon as表示一就，做题要留意主将从现As soon as we _ (get) there, he _ (tell) us the news.我们一到那，他就会告知我们那个消息。(7) since引导的时间状语从句，从句的谓语动词通常为一般过去时，主句的谓语动词通常为此时此刻完成时We _ never _ (meet) since we _ (graduate) from the college.大学毕业后我们就再没见过面。(8) till/until引导的时间状语从句 till和until同义，作直到时(为止)解，till多用于非正式文体，until多用于句首；not until通常与after进展转换。如：I wont go with you until(till) I finished my homework.=_.等我做完作业我才和你一起去。 3 / 3