YOU SAID:

i am messing around in class

INTO JAPANESE

私はクラスでいじり

BACK INTO ENGLISH

I was messing around in class

INTO JAPANESE

クラスかいじりだった

BACK INTO ENGLISH

Was messing around with class

INTO JAPANESE

クラスをいじりされました。

BACK INTO ENGLISH

Messing with the class was.

INTO JAPANESE

クラスをいじっていた。

BACK INTO ENGLISH

Was messing with the class.

INTO JAPANESE

クラスをいじっていた。

BACK INTO ENGLISH

Was messing with the class.