Introductory it as Subject
5.11 it V n adj to-infThe verb is followed by a noun group, an adjective group, and a to-infinitive clause. The noun group is the Object and the adjective group is the Object Complement.
There are only two verbs with this pattern.
I was sure he was thinking, you'll never pin this on me, Meg. And it drove me crazy to think that he might be right.