that whether who what which whoever whatever when where how why从 句引导词 :1. That he knows Japanese is known to all. 他懂英语 , 这一点大家都知道令我惊讶的是在这儿见到他 .3. When he will come is unknown .4. Whether he is coming doesn’t matter much. 他来不来没什么要紧的他什么时候来不清楚 .他们是怎么登上山顶的仍是个秘密 .5. It remains a secret how they climbed up the mountain.主语从句的位置 1. 在句首 2. 主语较长时通常放在后面 , 句首用形式主语 it. 主语太长了 ! 放到句尾That 无词义 , 不可省略What 作主语2. What surprised me was to see him here .When “ 什么时候”，作时间状语主语从句不用 if3. 主语从句考点一 : 主语从句后置，借用形式主语 it 为了避免主语冗长 , 句子头重脚轻 , 经常用 it 作形式主语 , 主语从句放在后面作真正的主语 .That we shall be late is certain.-- It’s certain that we shall be late.1. That the earth is round is known to all.-- 2. That you missed the chance is a pity.-- 由从属连词 whether, 连接代词 what ， who ， which和连接副词 when ， where ， why ， how 等引导 , 也常常后置。It is a pity that you missed the chance.It’s known to all that the earth is round. 用形式主语 it 的主语从句常见结构：1.It is clear (necessary, important, possible, remarkable) that… 很清楚（必要 , 重要 , 可能 , 值得注意等 )…2.It is a fact (a good thing, good news…) that … 事实是 ( 好事是 , 好消息是… )…3.It is well-known ( reported, recorded, estimated, said, believed) that…众所周知 ( 据报道 , 据记载 , 据估计 , 据说 )…4.It turns out ( seems, happens, appears…) that… 结果是 ( 似乎是 , 碰巧是 , 好象是… )… 5.It has been found (has been proved, can be seen, must be pointed out) that … 已发现 ( 已证明 , 可以看出 , 需指出 )…用 it 句型翻译1.据说今年高一学生要学新教材 .2.事实是他们靠自己完成了所有的任务 .3.碰巧他们已经参加过会议了...
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