English Grammar - Subject Clause

that引导主语从句

一般置于句末,偶尔也置于句首

that引导的主语从句置于句首

  1. That the seas are being overfished has been known for years.
  2. That the plates are moving is now beyond dispute.

有时候即使很长很复杂的主语从句,也可以直接置于句首来做主语(并不常见)

  1. That such a conjunction of circumstances might accur again soon, especially considering shrinking US defense budgets and diminishing overseas base access, is problematical at best.

that引导的主语从句置于句末

It+be动词+过去分词+that从句

It+be动词+形容词+that从句

It+be动词+名词短语+that从句

It+不及物动词+that从句

句型 含义 例句
It seems that... 似乎...
It follows that... 因此.../由此可见
It happens that... 碰巧...
It turn out that... 结果证明是...
It comes about that... 结果是...

其他结构

it is/was...that引导的主语从句与作为强调句使用的区别

把强调句的 It is 和 that 丢掉,整个句子还是完整的,而主语从句去掉后句子会出错

  1. It is a pity that our team should lose the game.
    去掉it is...that...后, our team should lose the agme/ a pity 这句会出错,所以是主语从句
  2. It was on a rainy day that Lu Yiping borrowed money from her father.
    去掉it is...that...后,Lu Yiping borrowed money from her father on a rainy day. 这句正确,所以是强调句
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