If I had a pair of wings I could fly.
The Second Conditional is used to talk about 'impossible' situations, in the present or in the future.
If + past simple, would/might/could + infinitive
Examples:
- If I had millions dollars, I'd give a lot to charity.
- If I won the lottery I would build an eco-sustainable village.
If you were to walk another hundreds kilometres in that direction, you would eventually get to Berlin.
More examples:
- If I had the chance to do it again, I would do it differently.
- If they were thinking of selling, I would want to buy.
- If my team won the Cup, I'd buy champagne for everybody.