YOU SAID:
i have a cat with a pig
INTO JAPANESE
ブタと猫を飼っています
BACK INTO ENGLISH
I have a pig and a cat
INTO JAPANESE
豚と猫がいます
BACK INTO ENGLISH
There is a pig and a cat
INTO JAPANESE
豚と猫がいます
BACK INTO ENGLISH
There is a pig and a cat
That didn't even make that much sense in English.