初中英语状语从句知识点：时间状语从句
<p> 连词主要有：<span word="when">when</span> <span word="as">as</span> <span word="while">while</span> <span word="before">before</span> <span word="after">after</span> <span word="until">until</span> <span word="as">as</span> <span word="soon">soon</span> <span word="as">as</span> <span word="since">since</span>等</p><p> (1)区别<span word="when">when</span>, <span word="as">as</span>, <span word="while">while</span>的用法</p><p> ①.<span word="when">when</span>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：</p><p> _________ <span word="the">the</span> <span word="students">students</span> <span word="heard">heard</span> <span word="the">the</span> <span word="teachers">teachers</span> <span word="footsteps">footsteps</span>, <span word="they">they</span> <span word="all">all</span> <span word="stopped">stopped</span> <span word="talking">talking</span>.</p><p> 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)</p><p> ② <span word="as">as</span>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：</p><p> <span word="We">We</span> <span word="were">were</span> <span word="having">having</span> <span word="breakfast">breakfast</span> __________ <span word="she">she</span> <span word="was">was</span> <span word="combing">combing</span> <span word="her">her</span> <span word="hair">hair</span>.</p><p> 她梳头时我们在吃早饭。</p><p> ③ <span word="while">while</span>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：</p><p> <span word="I">I</span> <span word="can">can</span> <span word="learn">learn</span> ________ <span word="I">I</span> <span word="work">work</span>.</p><p> 我可以边工作边学习。</p><p> 用<span word="when">when</span>, <span word="as">as</span>, <span word="while">while</span>填空：</p><p> ________ <span word="you">you</span> <span word="came">came</span> <span word="in">in</span>, <span word="I">I</span> <span word="was">was</span> <span word="talking">talking</span> <span word="with">with</span> <span word="a">a</span> <span word="few">few</span> <span word="boys">boys</span>.</p><p> <span word="It">It</span> <span word="started">started</span> <span word="to">to</span> <span word="rain">rain</span> __________ <span word="we">we</span> <span word="were">were</span> <span word="playing">playing</span> <span word="outdoors">outdoors</span>.</p><p> <span word="They">They</span> <span word="talked">talked</span> _________ <span word="they">they</span> <span word="walked">walked</span> <span word="down">down</span> <span word="the">the</span> <span word="river">river</span>.</p><p> __________ <span word="it">it</span> <span word="was">was</span> <span word="raining">raining</span>, <span word="the">the</span> <span word="students">students</span> <span word="were">were</span> <span word="playing">playing</span> <span word="basketball">basketball</span>.</p>
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