I use a variety of online german dictionaries and I am curious about an aspect of the format. With entries that are verbs, the word in question typically has three conjugated examples next to it. It tends to look something like this:
pla·nen (planst, plante, hat geplant) planen VERB (mit OBJ)
The convention seems to be to include the 2nd person present indicative, the first person past tense, and the third person present perfect.
My question is why is this? if someone could give me some insight as to the logic of this convention, I would be immensely grateful.