I need to Change the Given conditional clauses into its other 2 types, i.e., into its imaginary and impossible clause.
"I will help you, if it's possible"
- I would help you, if it was possible.
- I would have helped you, if it had been possible.
I am confused when I have written that:
- 'I would help you, if it "was" or "were" possible.'
because its can be used as an adjective as well as pronoun or should I use 3rd person singular concept here, it may be than?