As the sentence says, "It was selfish of her to leave without helping us."
Is it OK to say "She was selfish to leave without helping us"?
Thanks for responding to this question!!
(1) It was selfish of her to leave without helping us.
(2) She was selfish to leave without helping us.
Yes, it's fine -- they are just two different ways of saying the same thing. (2) is just as correct as (1) and assuming that the referent of "her" and "she" is the same person, then (1) entails (2) i.e. they can only have the same meaning.
Grammatically, though, they are quite different. If you're interested, let me know and I'll explain the difference.
Thank you, Paul!
Please let me konw the difference.
Consider these three:
(1) She was selfish to leave without helping us.
(2) It was selfish of her to leave without helping us.
(3) To leave without helping us was selfish of her.
The difference is that (2) is called an 'extraposition' construction. This occurs when the subordinate clause subject of a non-extraposed sentence (3) is moved to the end of the sentence and replaced by the dummy pronoun "it". We call the subordinate clause in (2) an extraposed subject.
In the extraposed (2) "it" is the subject and the adjective phrase "selfish of her" is the subjective predicative complement, just as it is in the non-extraposed (3).
So kind of you, Paul!