If I were to become a cat,

The subjunctive(仮定法)

If I were to become a cat,I could talk with you.
nyanya~nya~nya~:D mew?mewmew~:D.
（未来のありえないこと。 少し可能性があるときには、should）


If I were fine today,I would go with you.
（現在）


If I had not been busy,I would have gone with you.
（過去）