YOU SAID:

I like cows that sing.

INTO JAPANESE

私は歌う牛が好きです。

BACK INTO ENGLISH

I like singing cows

INTO JAPANESE

牛の歌を歌うのが好きです

BACK INTO ENGLISH

i like to sing cow songs

INTO JAPANESE

私は牛の歌を歌うのが好きです

BACK INTO ENGLISH

i like to sing cow songs