2)That-从句作主语通常用it作先行词,而将that-从句置于句末,例如:
It is quite clear that the whole project is doomed to failure. 很清楚,整个计划注定要失败。
It"s a pity that you should have to leave. 你非走不可真是件憾事。
用it作形式主语的that-从句有以下四种不同的搭配关系:
a. It be 形容词 that-从句
It is necessary that 有必要
It is important that 重要的是
It is obvious that 很明显
b. It be -ed 分词 that-从句
It is believed that 人们相信
It is known to all that 从所周知
It has been decided that 已决定
c. It be 名词 that-从句
It is common knowledge that 是常识
It is a surprise that 令人惊奇的是
It is a fact that 事实是
d. It 不及物动词 that-分句
It appears that 似乎
It happens that 碰巧
It occurred to me that 我突然想起
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