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【初中英语状语从句】详解(2️⃣)
【初中英语状语从句】详解(2️⃣)三、条件状语从句（主将从现是第一大考点）（一）核心引导词【帮孩子树立自信，方能战胜困难】1．if 如果例：If it rains tomorrow, we will stay at home. 如果明天下雨，我们就待在家里。例：If you work hard, you will pass the exam. 如果你努力学习，就会通过考试。2．unless 除非（＝if...not）例：You will fail the exam unless you work hard. ＝ You will fail the exam if you don't work hard. 除非你努力学习，否则会不及格。例：Unless it rains, the game will be held. 除非下雨，否则比赛将照常举行。【易错】unless 本身含否定，从句里不再加 not。3．as long as 只要例：As long as you keep trying, you will succeed. 只要你不断尝试，就会成功。（二）主将从现（必须刻在脑子里）规则：主句用一般将来时（will/shall），从句用一般现在时表示将来。例：If he comes（不是 will come）tomorrow, I will tell him.例：We won't go hiking if it rains（不是 will rain）.【拓展】这条规则同样适用于时间状语从句（when, as soon as, until 等）。"祈使句＋or/and＋将来句"可与之互相转换：Study hard, or you will fail. ＝ If you don't study hard, you will fail.四、原因状语从句（一）核心引导词1．because 因为（语气最强，直接回答 why）例：— Why were you late? — Because I missed the bus.例：I didn't go to the party because I was ill. 我病了，所以没去聚会。2．since 既然（双方都知道的原因）例：Since everyone is here, let's begin our class. 既然大家都到了，我们开始上课吧。3．as 由于（语气最弱，附带提一下原因）例：As it was late, we went home. 由于天晚了，我们就回家了。4．for 因为（并列连词，表补充说明，前面常加逗号）例：He must be ill, for he is absent today. 他一定病了，因为他今天缺席了。（二）辨析与考点① because 语序问题：because 从句可以放主句前，也可以放主句后；例：Because it was raining, we stayed at home. ＝ We stayed at home because it was raining.② 【头号易错】because 不能与 so 连用！错例：Because it was raining, so we stayed at home.（×）中文习惯说"因为……所以……"，英文只能二选一。③ because 通常不与 not...but 连用之外的并列结构混搭，单独记"because 与 so 不共戴天"即可。 或评论区留言
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