YOU SAID:

we dont need anything else

INTO JAPANESE

我々 は何を必要はありません。

BACK INTO ENGLISH

We don't need anything.

INTO JAPANESE

我々 は何かを必要はありません。

BACK INTO ENGLISH

We don't need to do something.

INTO JAPANESE

我々 は何かをする必要はありません。

BACK INTO ENGLISH

We need to do something.

INTO JAPANESE

我々 は何かをする必要があります。

BACK INTO ENGLISH

We must do something.

INTO JAPANESE

我々 は何かを行う必要があります。

BACK INTO ENGLISH

We must do something.