SAT语法之主语从句！

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主语从句，即在复合句中当主语成分的句子，例如"That he finished writing the composition in such a

short time surprised us

all"，他在很短的时间内写完作文让我们都很惊讶，此复合句主要描述的是某事让我们惊讶，某事就是该复合句的主语，因此“That he finished

writing the composition in such a short time”便是该复合句的主语从句。

定义说完了 ，那我们就来看看关于主语从句中的几个常用连词用法和例句：

1、由连词that引导的主语从句。 that 在从句中不做成分且不能省略

例如：

That you will win the medal seems unlikely. 你想获得奖牌看起来是不可能的。

That you are so indifferent bothers me. 你如此冷淡使我很烦恼。

That she survived the accident is a miracle. 她在事故中幸免于难简直是奇迹。

2、用连接副词whether, when等引导的主语从句

例如：

Whether she is coming or not doesn’t matter too much. 她来不来都无关紧要。

When he comes has not been decided yet.

3、用关系代词what等引导的主语从句

例如：

What you need is more practice. 你所需要的是更多的训练。

What I want to know is this. 我想知道的就是这事。

Whatever we do is to serve the people. 我们无论做什么都是为人民服务。

4、主语从句可以直接放在主语位置上，也可以用it作形式主语，而将从句放在句末(尤其是当谓语较短时)

例如：

That light travels in straight lines is known to all. 光沿直线传播，这是众所周知的事。 =It is

known to all that light travels in straight lines. 众所周知光沿直线传播。

When the plane is to take off has not been announced . 飞机何时起飞还没有宣布。 = It has

not been announced when the plane is to take off. 还没有宣布飞机何时起飞。

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