YOU SAID:

I speak for the trees.

INTO JAPANESE

私は木のために話します。

BACK INTO ENGLISH

I speak for trees.

INTO JAPANESE

私は木について話します。

BACK INTO ENGLISH

I talk about trees.

INTO JAPANESE

木について話します。

BACK INTO ENGLISH

Talk about trees.

INTO JAPANESE

木について話しなさい。

BACK INTO ENGLISH

Talk about trees.