YOU SAID:
i hate when my girlfriend is moody all day
INTO JAPANESE
私は私のガールフレンドが一日中不機嫌なときに嫌い
BACK INTO ENGLISH
I hate when my girlfriend is grumpy all day
INTO JAPANESE
私は私のガールフレンドが一日中不機嫌なときが嫌いです
BACK INTO ENGLISH
I hate when my girlfriend is grumpy all day
That didn't even make that much sense in English.