1、It + be + 名詞 + that從句：It is a fact that 事實(shí)是。

It is an honour that 非常榮幸。

It is common knowledge that …是常識(shí)。

It is a pity that 遺憾…… 。

2、It + be + 動(dòng)詞的過去分詞+ that從句。

It is said that 據(jù)說。

It is reported that 據(jù)報(bào)道。

It has been proved that 已經(jīng)證明。

It is believed that … 人們認(rèn)。

It is supposed that… 據(jù)猜測，

3、It + 不及物動(dòng)詞（vi） + that 從句。

It seems that 似乎。

It happened that 碰巧。

It appears that 似乎。

4、It is natural that… 很自然…。

It is strange that… 奇怪的是… 。