"I am helping you all."
Translation:Ich helfe euch.
There isn't really a gerund form in German like in English, so usually you would translate the "am helping" just in the normal present tense ("ich helfe" = I help). To emphasize the fact, that you are doing this right now, you could add "gerade":
"Ich helfe euch gerade"
(In some parts of Germany there is a similar construct as the gerund. In Nordrhein-Westfalen for example you might actually hear: "Ich bin euch am helfen", but note that this is dialect and not considered to be correct or good German. So I would not recommend using it ;) )