本文主要是介绍主语从句-名词性从句(基础)，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
(这些都是去年在onenote上写的笔记)
若从句为陈述句，直接加that;
若从句为特殊疑问句：直接保留特殊疑问词，后面的句子变成陈述句语序；
若从句为一般疑问句：先把一般疑问句变成陈述句语序，然后在其前加上weather或者If;
区别 位置：直接置于句首；
That the college will take in more students is true.
Whether he will come or not hasn't been decided.
Why he isn't here is not clear to everyone.
要特别当心 :
主语从句还会发生形式的变化，可以把从句挪到句子的后面，然后再其前面加上形式主语it.
it 做形式主语的情况
(1) It is +名词+主语从句；
It is apity that you should have to leave.
(2) It is +形容词+主语从句；
It is clear that the whole project is due to failure.
如果是It is necessary/important/strange/natural+that引导的主语从句，从句中的谓语动词一定要用should+动词原形；
It is necessary that one should master the skills of operating computer.
(3)It is+过去分词+主语从句；It is said/planted/expected..(固定句型)
It is saidthat President Bush will visit out school next week.
(4)It is +不及物动词+形容词表语形式+主语从句； (It +系动词 +不及物动词+形容词表语形式+主语从句)
It seemedcertain that he will win the prize.
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