There are two kinds of participles in German. One, the past participle, or Partizip II, you already know from the Perfekt tense and the Passive. And if there’s a Partizip II there must be a Partizip I, don’t you think? And that’s exactly the case here. The PI is pretty easy to build. Just add a -d to the infinitive and you are done:
lachen + d = lachend > laugh.ing
wüten + d = wütend > rage.ing
weinen + d = weinend > cry.ing
And that’s all there is to it. Unlike in English, the PI is actually almost always used as an adjective. That means you need to refresh your memory of the adjective endings. No worries. As long as you can understand this topic you’ll be fine. No need to worry about using it properly at this stage of your learning. Ready? Take a look at the following examples:
Example
Der Iltis stinkt. - The polecat is stinking. | riechen - to smell
A: Ich sehe einen gut riechenden Fuß.
Der Zug fährt langsam. - The train is going slowly. | sehen - to see
A: Ich sehe einen langsam fahrenden Zug
Lecker is not an adjective here hence no ending.
This topic is covered in: B1-L32 and B2-L21.