Introductory it as Subject
Pattern group 2: it V to n clauseThere are four patterns in this group, each consisting of it, the verb, a prepositional phrase beginning with to, and a type of clause:
2.1 it V to n thatIt seems to me that I had done everything I could.
2.2 it V to n to-infIt fell to me to organize the event.
2.3 it V to n whIt matters to me what happens to you.
2.4 it V to n as if/as though/likeIt sounds to me as if you don't want to help her.