本文目录
主语从句加表语从句的句子
（1）That he finished writing the composition in such a short time surprised us all.
（2）Whether we will go for an outing tomorrow remains unknown.
（3）Who will be our monitor hasn't been decided yet.
（4）Whom we must study for is a question of great importance.
（5）What caused the accident remains unknown.
（6）Whatever you did is right.
（7）Who the watch belongs to is unknown.
（8）What we need is time.
（9）What we need are good doctors.
（1）It is certain that he will win the match.
（2）It is true that he has made a very important discovery in chemistry.
（3）It is very likely that they will hold a meeting.
（4）It is strange that he should do that.
（5）It is important that we all should attend the meeting.
（6）It is strange that the man should have stuck to his silly ideas.
（7）It is a pity that we won't be able to go to the south to spend our summer vacation.
（8）It is still a mystery what caused the accident.
（9）It is said that he has gone to shanghai.(=He is said to have gone to shanghai)
（10）It is known to all that the gun powder was first invented by the Chinese.
（11）It is suggested that the work should be done with great care.
（12）It happened that the two cheats were there. (=The two cheats happened to be there)
主语从句是什么
主语从句在句中充当主语，由关系词引导，当主语从句完整时用that引导，不完整时用关系代词或关系副词（即常见的疑问词）引导，常见的有what,who,which,where,when,why等。
e.g:( What matters most in learning English) is enough practice.括号里为主从。
一个简单的主语从句
就是句子里的句子
做主语、宾语、定语、表语某一成分 做什么就叫什么从句：主语从句、宾语从句……
eg:宾语从句 I think that it is a dog.
主语从句例句
1、That he finished writing the composition in such a short time surprised us all.
他在如此短的时间内写完作文使我们十分惊讶。
2、Whether we will go for an outing tomorrow remains unknown.
我们明天是否会去郊游仍旧未知。
3、Who will be our monitor hasn't been decided yet.
现在还没有决定谁会成为我们的班长。
4、Whom we must study for is a question of great importance.
“我们为谁而学习”是个很重要的问题。
5、What caused the accident remains unknown.
事故的起因是未知的。
扩展资料：
用it 作形式主语的结构
(1) It is +名词+that从句
It is a fact that … 事实是……
It is an honor that …非常荣幸
It is common knowledge that …是常识
(2) it is +形容词+that从句
It is natural that… 很自然……
It is strange that… 奇怪的是……
(3) it +不及物动词+that从句
It seems that… 似乎……
It happened that… 碰巧……
(4) it is+过去分词+that从句
It is reported that… 据报道……
It has been proved that… 已证实……
参考资料来源：百度百科-主语从句
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