初中英语时态知识点：常见的主将从现的四种情况
<p> 主将从现</p><p> 主将从现是指在时间状语从句和条件状语从句和让步状语从句中，如果主句是一般将来时，从句用一般现在时替代一般将来时。主将从现</p><p> 常见的有以下四种情况：</p><p> 一、时间状语从句的主句是一般将来时，那么从句常常用一般现在时。</p><p> 如： <span word="When">When</span> <span word="I">I</span> <span word="grow">grow</span> <span word="up">up</span>, <span word="Ill">Ill</span> <span word="be">be</span> <span word="a">a</span> <span word="nurse">nurse</span> <span word="and">and</span> <span word="look">look</span> <span word="after">after</span> <span word="patients">patients</span>.</p><p> 我长大后要当一名护士，照顾病人。</p><p> 二、如果主句是祈使句，那么从句通常要用一般现在时</p><p> 如：<span word="Dont">Dont</span> <span word="laugh">laugh</span> <span word="at">at</span> <span word="me">me</span> <span word="when">when</span> <span word="I">I</span> <span word="make">make</span> <span word="a">a</span> <span word="mistake">mistake</span>.</p><p> 我犯错误的时候不要笑话我。</p><p> 三、如果主句是含有情态动词的一般现在时，根据需要从句多用一般现在时</p><p> 如：<span word="You">You</span> <span word="should">should</span> <span word="be">be</span> <span word="quiet">quiet</span> <span word="when">when</span> <span word="you">you</span> <span word="are">are</span> <span word="in">in</span> <span word="the">the</span> <span word="reading">reading</span> <span word="room">room</span></p><p> 在阅览室时应保持安静。</p><p> 四、 如果<span word="if">if</span>的条件状语从句遇到变换间接和直接时 , 祈使句应用<span word="not">not</span> <span word="to">to</span>....</p><p> 如; <span word="She">She</span> <span word="said">said</span> <span word="not">not</span> <span word="to">to</span> <span word="close">close</span> <span word="the">the</span> <span word="window">window</span></p><p> 常见的时间状语从句的连词有：<span word="as">as</span> <span word="soon">soon</span> <span word="as">as</span>,<span word="when">when</span>,<span word="while">while</span> ,<span word="as">as</span>,<span word="until">until</span>等</p><p> 主将从现说的是在含有时间状语从句和条件状语从句的主从复合句中，如果主句的时态是一般将来时，那么从句要用一般现在时。例如：</p>
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