YOU SAID:
she had a dream about a chicken
INTO JAPANESE
彼女は鶏について夢を見た
BACK INTO ENGLISH
She dreamed about a chicken
INTO JAPANESE
彼女は鶏を夢見ていた
BACK INTO ENGLISH
She dreamed of a chicken
INTO JAPANESE
彼女は鶏を夢見ていた
BACK INTO ENGLISH
She dreamed of a chicken
That didn't even make that much sense in English.