YOU SAID:
If I get a cat then I would get multiple cats.
INTO JAPANESE
私が猫を飼うなら、私は複数の猫を飼うでしょう。
BACK INTO ENGLISH
If I have a cat, I will have multiple cats.
INTO JAPANESE
私が猫を飼っているなら、私は複数の猫を飼うでしょう。
BACK INTO ENGLISH
If I have a cat, I will have multiple cats.
That didn't even make that much sense in English.