主语从句句型
文章来源:句解霸 | 更新日期:2013-06-26
主语从句是在句子中充当主语。 它与其它名词性从句一样，语序上采用陈述语序，并由that、连接代词或连接副词引导。主语从句可以分为两大类。一种是与普通主语一样位于句首；另一种是用it作形式主语，而把真正的主语从句移到主句的后部。下面详述这两种句型。
1. 主语从句位于句首的句型
1) 由that 引导的主语从句
That he hasn't phoned is odd. 他还没来电话很奇怪。
That she will win the first seems impossible. 她赢得第一好像不大可能。
2) 由连接代词或连接副词引导的主语从句
What you need is a faster computer. 你需要的是一部更快的计算机。
Which of them are more reliable requires further test. 需要进一步的测试来了解它们中哪一个更可靠。
When she'll be back depends on the weather. 她什么时候将会回来取决于天气。
Where she has gone is not known yet. 她去了哪儿，还不知道。
How the prisoner managed to escape is still unknown. 仍然不知道犯人是如何设法逃跑的。
Why they suddenly disappeared still remains a mystery. 他们为什么突然间消失仍然是一个谜。
Whoever is responsible will have to pay for the damage. 无论是谁负责都必须赔偿损失。
Whether she is coming or not doesn't matter at all. 她来不来根本无关紧要。
3) 由 just because 引导的主语从句
由just because 引导的主语从句通常只用于 "Just because...doesn't mean..."句型中。
Just because it is legal doesn't mean it is ethical. 仅仅是符合法律并不意味着一定就合乎伦理。
Just because something has value doesn't mean it has a price. 有价值的东西并不一定就有价格。
2. 以it作形式主语的主语从句
1） it + be + 形容词 + 主语从句
It is unclear when he will come. 不清楚的他什么时候会来。
It is essential that we remember all the key points before the exams. 考试前记所有要点非常关键。
2） it + be + 名词 + 主语从句
It is common knowledge that fish can't live without water. 众所周知，鱼没有水就不能存活。
It is a good thing that we have so many tools. 我们有这么多工具是一件很好的事情。
3） it + 及物动词 + 宾语 + 主语从句
It makes no difference whether we go by train or by bus. 我们坐火车去还是坐公共汽车去都没有什么区别。
It shocked me that Peter did not tell anybody where he was. 让我吃惊的是彼得没有告诉任何人他在哪里。
4） it + 动词的被动语态 + 主语从句
It is estimated that the meeting will last four days. 这次会议预计将持续4天。
It has not been announced when the plane will take off. 还没有宣布飞机什么时候起飞。
5) it + 不及物动词 + 主语从句
It happened that my mother was out that day. 我母亲恰巧那天出去了。
It turns out that she was a friend of my sister. 结果是她是我姐姐的一个朋友。
6）it + be + 介词短语 + 主语从句
It is of great importance whether we can arrive there by 7:00pm. 我们是否能在晚上七点前到达那里非常重要。
7) 注意主语从句后移时, 引导词that 有时可以省列。
It was clear his words pleased her. 显然他的话使她很高兴。
It's a pity he can't swim. 很遗憾他不会游泳。
下一篇: 表语从句句型
1. 主语从句位于句首的句型
1) 由that 引导的主语从句
That he hasn't phoned is odd. 他还没来电话很奇怪。
That she will win the first seems impossible. 她赢得第一好像不大可能。
2) 由连接代词或连接副词引导的主语从句
What you need is a faster computer. 你需要的是一部更快的计算机。
Which of them are more reliable requires further test. 需要进一步的测试来了解它们中哪一个更可靠。
When she'll be back depends on the weather. 她什么时候将会回来取决于天气。
Where she has gone is not known yet. 她去了哪儿，还不知道。
How the prisoner managed to escape is still unknown. 仍然不知道犯人是如何设法逃跑的。
Why they suddenly disappeared still remains a mystery. 他们为什么突然间消失仍然是一个谜。
Whoever is responsible will have to pay for the damage. 无论是谁负责都必须赔偿损失。
Whether she is coming or not doesn't matter at all. 她来不来根本无关紧要。
3) 由 just because 引导的主语从句
由just because 引导的主语从句通常只用于 "Just because...doesn't mean..."句型中。
Just because it is legal doesn't mean it is ethical. 仅仅是符合法律并不意味着一定就合乎伦理。
Just because something has value doesn't mean it has a price. 有价值的东西并不一定就有价格。
2. 以it作形式主语的主语从句
1） it + be + 形容词 + 主语从句
It is unclear when he will come. 不清楚的他什么时候会来。
It is essential that we remember all the key points before the exams. 考试前记所有要点非常关键。
2） it + be + 名词 + 主语从句
It is common knowledge that fish can't live without water. 众所周知，鱼没有水就不能存活。
It is a good thing that we have so many tools. 我们有这么多工具是一件很好的事情。
3） it + 及物动词 + 宾语 + 主语从句
It makes no difference whether we go by train or by bus. 我们坐火车去还是坐公共汽车去都没有什么区别。
It shocked me that Peter did not tell anybody where he was. 让我吃惊的是彼得没有告诉任何人他在哪里。
4） it + 动词的被动语态 + 主语从句
It is estimated that the meeting will last four days. 这次会议预计将持续4天。
It has not been announced when the plane will take off. 还没有宣布飞机什么时候起飞。
5) it + 不及物动词 + 主语从句
It happened that my mother was out that day. 我母亲恰巧那天出去了。
It turns out that she was a friend of my sister. 结果是她是我姐姐的一个朋友。
6）it + be + 介词短语 + 主语从句
It is of great importance whether we can arrive there by 7:00pm. 我们是否能在晚上七点前到达那里非常重要。
7) 注意主语从句后移时, 引导词that 有时可以省列。
It was clear his words pleased her. 显然他的话使她很高兴。
It's a pity he can't swim. 很遗憾他不会游泳。
下一篇: 表语从句句型
