初中英语to的用法归纳是：不定式的句法功能，除了谓语外，不定式可以担当句子的任何成分。To see is to believe. 眼见为实。(作主语和表语)
To save time is to lengthen life. (不定式短语作主语)
You should continue to learn as long as you live.
She usually has a lot of meetings to attend in the evenings. 她晚上经常有很多会要开。(不定式短语作定语)
To /In order to do a good job, we must have the right tools.
He got up early in order to/ so as to catch the first bus.(不定式短语作目的状语)
I didn't expect you to arrive so early.