尽快地掌握科学知识，迅速提高学习能力,由xx为您提供的初三英语知识点推荐：时间状语从句，希望给您带来启发!
连词主要有：when as while before after until as soon as since等。 (1)区别when, as, while的用法
①.when当......时候引导的时间状语从句，其动词既可以是延续性动作的动词，也可以是瞬间性动作的动词,如：
_________ the students heard the teacher's footsteps, they all stopped talking.
当学生们听到老师的脚步声时，他们都停止了讲话。(从句动作发生在前)
② 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延续性的，而且侧重表示主句和从句的动作并相发生：
We were having breakfast __________ she was combing her hair. 她梳头时我们在吃早饭。
③ 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延续性的，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。
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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.
__________ it was raining, the students were playing basketball. Her brother watched TV__________ he ate supper.
只要这样踏踏实实完成每天的计划和小目标，就可以自如地应对新学习，达到长远目标。由xx为您提供的初三英语知识点推荐：时间状语从句，祝您学习愉快!
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