YOU SAID:

he went to the her place which is why the dog ate a grasses

INTO JAPANESE

彼は彼女の場所に行きました、それが犬が草を食べた理由です

BACK INTO ENGLISH

He went to her place, that's why the dog ate grass

INTO JAPANESE

彼は彼女の場所に行きました、それで犬は草を食べました

BACK INTO ENGLISH

He went to her place, so the dog ate grass

INTO JAPANESE

彼は彼女の場所に行ったので、犬は草を食べました

BACK INTO ENGLISH

The dog ate grass because he went to her place

INTO JAPANESE

彼は彼女の場所に行ったので犬は草を食べました

BACK INTO ENGLISH

The dog ate grass because he went to her place