YOU SAID:
Hey the girl was at dance with all of her friends
INTO JAPANESE
ちょっと女の子が彼女のすべての友人と踊っていた
BACK INTO ENGLISH
Hey girl was dancing with all her friends
INTO JAPANESE
ちょっと女の子は彼女のすべての友人と踊っていました
BACK INTO ENGLISH
Hey girl was dancing with all her friends
That didn't even make that much sense in English.