YOU SAID:

I'm going to go down the slide now.

INTO JAPANESE

私は今スライドを下るつもりです。

BACK INTO ENGLISH

I'm going down the slide now.

INTO JAPANESE

私は今スライドを下ります。

BACK INTO ENGLISH

I'm down the slide now.

INTO JAPANESE

私は今スライドを下っています。

BACK INTO ENGLISH

I'm down the slide now.