YOU SAID:
you and I are playing with him and her
INTO JAPANESE
あなたと私は彼と彼女と遊んでいます
BACK INTO ENGLISH
You and I are playing with him and her
INTO JAPANESE
あなたと私は彼と彼女と遊んでいます
BACK INTO ENGLISH
You and I are playing with him and her
That didn't even make that much sense in English.