形式主语从句是雅思写作中非常常用的一种句型。我们先来看一下它是如何构成的。(That + 一个完整的句子可做主语)。比如说：(That education is important) is clear.这就是主语从句的基本形式。但如果句子要是这样，主语过长。所以，我们习惯于用it来代替原来的主语。而把原来的主语放在句子的最后。这句话可改为：It is clear that education is important.这就叫做形式主语从句。
以下的形式主语从句句型在雅思写作中都常常用到。希望大家能认真掌握，灵活使用。
1 It is often the case that
2 It’s a fact that
3 It seems that
4 It’s said that
5 It’s reported that
6 It’s believed that
7 It’s universally accepted that
8 It’s announced that
9 It’s estimated that
10 It must be admitted that
