形式主語從句是雅思寫作中非常常用的一種句型。我們先來看一下它是如何構(gòu)成的。(That + 一個(gè)完整的句子可做主語)。比如說：(That education is important) is clear.這就是主語從句的基本形式。但如果句子要是這樣，主語過長。所以，我們習(xí)慣于用it來代替原來的主語。而把原來的主語放在句子的最后。這句話可改為：It is clear that education is important.這就叫做形式主語從句。
以下的形式主語從句句型在雅思寫作中都常常用到。希望大家能認(rèn)真掌握，靈活使用。
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
11 It’s obvious that
12 It must be stressed out that
13 It is widely-accepted that
14 It cannot be denied that
15 It can be foreseen that
16 It’s as clear as crystal that
17 It goes without saying that
18 It is acknowledged that
19 It is well-known that
20 It is estimated that