YOU SAID:

I should be doing homework right now.

INTO JAPANESE

私は今宿題をやっている必要があります。

BACK INTO ENGLISH

I'm doing my homework right now.

INTO JAPANESE

今、私の宿題をやっています。

BACK INTO ENGLISH

Now, doing my homework.

INTO JAPANESE

今、宿題をしています。

BACK INTO ENGLISH

Now, to do homework.

INTO JAPANESE

今、宿題をします。

BACK INTO ENGLISH

Now, do your homework.

INTO JAPANESE

宿題をしなさい。

BACK INTO ENGLISH

Do your homework.

INTO JAPANESE

宿題をしなさい。

BACK INTO ENGLISH

Do your homework.