一、it作形式主语的常用句型
1.It takes (sb. ) some time/energy/effort...to do sth.
It took the students about two hours to finish cleaning the classroom that day.
那天花了同学们大约两个小时才把教室打扫完。
2.It is/was＋形容词＋(of/for sb. ) to do sth.
In order to have much knowledge of Chinese culture，it is important for you to be aware of the content，Tang poetry.
为了掌握许多中国文化知识，对你来说，了解唐诗的内容非常重要。(2017·全国Ⅰ)
3.It is/was＋形容词＋that...
It is true that the Internet plays an important role in our daily life.
确实，网络在我们的日常生活中扮演重要的角色。
4.It is/was＋名词＋(of/for sb. ) to do sth.
In the end，kids as we are，it’s our duty to control ourselves，which will greatly help our lives and study.
最后，尽管我们是孩子，但是自控是我们的责任，它会对我们的生活和学习大有帮助。
5.It is/was＋名词＋that...
It is an honour that I have been chosen to give a speech on behalf of my school.
被选中代表我的学校做演讲，我很荣幸。
