YOU SAID:

he is the cow of the cow the cow

INTO JAPANESE

彼は牛の牛であり、牛である

BACK INTO ENGLISH

he is a cow and a cow

INTO JAPANESE

彼は牛であり、牛である

BACK INTO ENGLISH

he is a cow, he is a cow

INTO JAPANESE

彼は牛である、彼は牛である

BACK INTO ENGLISH

he is a cow, he is a cow