YOU SAID:

I am going to class now.

INTO JAPANESE

今のクラスにつもりです。

BACK INTO ENGLISH

Now class is going.

INTO JAPANESE

今クラスが起こっています。

BACK INTO ENGLISH

Classes that are happening right now.

INTO JAPANESE

今起こっているクラス。

BACK INTO ENGLISH

Classes are going on right now.

INTO JAPANESE

クラスが今起こっています。

BACK INTO ENGLISH

Classes are going on right now.